# Sheep Barn Quarantine Area Design for New Arrivals ## Key Takeaways - A minimum quarantine period of 21-30 days, ideally 60 days for high-value or closed flocks, is critical to break disease transmission chains, as subclinical carriers can shed pathogens like *Mycoplasma ovipneumoniae* (OPP) or *Corynebacterium pseudotuberculosis* (CL) without visible symptoms. - Physical separation of at least 30 feet with solid partitions or double fencing is essential to prevent aerosol and direct contact transmission of diseases such as footrot (*Dichelobacter nodosus*) and respiratory pathogens. - Dedicated equipment (feeders, waterers, halters, trimmers) and strict biosecurity protocols for personnel, including changing boots and coveralls, are paramount to prevent mechanical transmission of pathogens like *Clostridium perfringens* or gastrointestinal nematodes. - Diagnostic testing, including fecal egg counts (FEC) on arrival and at quarantine's end to monitor gastrointestinal parasite burdens and anthelmintic resistance, and blood tests for diseases like OPP and CL, are crucial for identifying subclinical infections. - A comprehensive health assessment upon arrival, including temperature, mucous membrane color (indicating anemia from parasites), and hoof inspection for lesions, establishes a baseline and identifies immediate concerns requiring isolation or treatment. - Proper manure management, including removal and disinfection of pens with effective agents like quaternary ammonium compounds, is vital as barn environments with high humidity and limited sunlight promote the survival of bacteria, viruses, and parasite eggs. --- Bringing new sheep onto your farm is one of the highest risk moments for herd health. A single carrier animal can introduce footrot, caseous lymphadenitis (CL), ovine progressive pneumonia (OPP), internal parasites resistant to dewormers, or contagious diseases that affect your entire flock for years. This guide explains how to design and manage a sheep barn quarantine area that protects your existing animals and gives new arrivals the best chance to settle in without incident. It is written for sheep producers who keep animals in barns, hoophouses, or mixed housing systems, and who need a practical, step by step plan for isolation that fits their existing facilities. The content covers the core principles of quarantine design, how to set up a pen correctly, how long to quarantine and what to test, how to handle manure and feed, daily monitoring routines, and clear signs that you need professional help. You will also find answers to common questions that come up when producers plan isolation space. The goal is not to turn your barn into a hospital ward, but to build a simple, repeatable system that reduces disease introduction risk without consuming your entire day. ## At a Glance - Quarantine every new sheep for a minimum of 21 to 30 days, and ideally 60 days if you have high value stock or a closed flock. - Locate the quarantine pen at least 30 feet away from your main flock, with solid partitions or double fencing to prevent nose to nose contact. - Use a separate airspace where possible, especially in winter when barn ventilation is reduced. - Design the pen so you can clean and disinfect it completely between groups, with smooth floors, washable walls, and good drainage. - Handle quarantine animals last each day, after you finish chores with the main flock. - Change boots, coveralls, and gloves between quarantine and main flock work. - Keep a dedicated set of equipment for the quarantine area, including feeders, waterers, halters, and shears. - Run a fecal egg count test on arrival and again at the end of quarantine to identify parasite problems. - Test for OPP, CL, and footrot based on your region and the risk level of the source flock. - Maintain a written record for every animal in quarantine, including temperature, appetite, feces, and any treatment given. - If an animal shows signs of contagious disease, extend quarantine and call your veterinarian for diagnostic testing. ## Why Quarantine Matters for Sheep Barns Sheep barns create special challenges for disease control because they concentrate animals in a shared airspace with high humidity, limited sunlight, and surfaces that stay warm and moist. These conditions help bacteria, viruses, and parasite eggs survive longer than they would outside in dry, sunny conditions. A quarantine area that works for pasture based sheep may not be sufficient inside a barn where aerosol transmission is more likely and where contamination builds up on floors, walls, and feeders. The main purpose of a quarantine area is to break the chain of transmission between new arrivals and your established flock. New sheep can carry diseases without showing any signs. Footrot has a long incubation period, and an animal can be infected with the bacteria but not yet show lameness. CL abscesses may be internal and undetectable. OPP is a slow virus that can take years to cause visible illness, but an infected animal sheds the virus in respiratory secretions. Parasite eggs pass in feces, and resistant strains of barber pole worm and other gastrointestinal nematodes can establish on your property within weeks of a single contaminated animal arriving. A quarantine period gives you time to observe the animal, run diagnostic tests, and treat problems before the animal joins the main flock. It also gives the new animal time to adjust to your feed, water, and handling routines, which reduces stress and helps its immune system function properly. Stressed animals are more susceptible to disease and shed more pathogens if they are infected, so a calm, well designed quarantine pen is part of disease prevention, not just an inconvenience. The design of the quarantine area matters because a poorly planned pen can create false confidence. If your quarantine pen shares a wall with the main flock and animals can touch noses through a gate, the quarantine is not effective for respiratory diseases. If you walk through the quarantine pen on your way to feed the main flock, you become the vector. If the pen has a dirt floor that cannot be disinfected, parasite eggs and footrot bacteria persist for the next group. Planning the space, the traffic flow, and the cleaning routine is the real work of quarantine design. ## Designing the Quarantine Pen Location The first decision is where to put the quarantine pen. The ideal location is in a separate building or a separate room within the barn, with its own entrance and its own airspace. If that is not possible, place the pen at the far end of the barn, away from the main flock, with at least 30 feet of buffer space. The distance reduces the chance of aerosol transmission and keeps curious animals from reaching each other. Solid walls or solid partitions are better than open gates or woven wire for the quarantine pen. Sheep are social animals and will press against a fence to investigate a newcomer. If they can touch noses, they can exchange respiratory secretions. Footrot bacteria can also be shed in saliva and nasal discharge, so fence line contact is not safe. Use solid sheeting, plywood, or a double fence arrangement with a gap between the quarantine pen and the main flock area. A double fence with a 4 foot alley creates a physical barrier that sheep cannot cross and keeps them far enough apart to prevent nose to nose contact. Consider the air flow in your barn. Most sheep barns are naturally ventilated with open ridges and side curtains. If your quarantine pen is downwind of the main flock, airborne particles from the new animals travel toward your established animals. Position the quarantine pen downwind of the barn exhaust or on the leeward side, so that air moves from the main flock toward the quarantine area and not the reverse. In mechanically ventilated barns, the quarantine room should have its own exhaust fan or be on a separate ventilation zone if possible. If you cannot separate the airspace, at least ensure that the quarantine pen has good airflow to prevent ammonia buildup and respiratory stress, and accept that aerosol disease control is weaker. The pen should have a solid floor. Concrete is the best choice because it can be scraped, washed, and disinfected. A sealed floor of epoxy or high quality sealant is also acceptable. Dirt floors are not recommended for quarantine because they harbor parasite eggs, footrot bacteria, and other pathogens that are nearly impossible to eliminate. If you have no choice but to use a dirt floor, plan to remove the top 4 inches of soil between groups and replace it with clean fill, and be aware that this is a less effective barrier. Gravel floors are also difficult to disinfect and should be avoided. Drainage is important. The pen should slope slightly to a drain or to the outside so that water from washing does not pool. Standing water keeps disinfectants from working and creates a breeding surface for bacteria. If you cannot install a drain, plan to squeegee water out the door and use a disinfectant that is effective in the presence of organic matter, or clean with a two step process of washing then disinfecting. The pen size depends on the number of animals you expect to quarantine at one time. A single sheep needs at least 15 to 20 square feet of floor space. A ewe with lambs needs more, around 25 to 30 square feet. If you plan to quarantine groups of 10 or more, provide 20 square feet per animal and add extra space for feeders and waterers so that animals do not crowd. Overcrowding increases stress and disease spread, so err on the side of more space if you have it. ## Building the Quarantine Pen Structure The physical structure of the pen should be easy to clean, safe for the animals, and secure enough to prevent escape. Use materials that can withstand repeated washing and disinfection. Galvanized steel panels, solid wood with sealed surfaces, or concrete block walls are good options. Avoid porous materials like untreated wood that absorb moisture and harbor bacteria. The pen needs a solid gate that latches securely. Sheep will test the gate, and a loose latch can lead to an escape that mixes quarantine animals with the main flock. Install a self closing gate or a latch that requires two steps to open, such as a lift and slide mechanism, to reduce the chance of accidental opening. Place a sign on the gate that says quarantine, so that visitors and family members know not to enter without following your biosecurity routine. Provide a separate entrance to the quarantine pen that does not require walking through the main flock area. If the pen is inside a larger barn, create a dedicated aisle or door. The goal is to make it easy to work with quarantine animals without crossing paths with your established flock. If you must walk through the main flock to reach quarantine, do that chore last and change your outer clothing before returning to the main flock area. The pen should have a solid roof or be inside the barn to protect animals from weather extremes. Newly arrived sheep are often stressed from transport, and exposure to cold rain or wind can trigger respiratory disease. If your quarantine area is outside, provide a three sided shelter that faces away from prevailing winds. In winter, add extra bedding and consider a heat lamp for lambs or shorn sheep, but use heat lamps with care because they are a fire hazard and can cause burns if placed too close. Inside the pen, provide a clean, dry lying area. Use straw or wood shavings for bedding, and change it frequently. The bedding absorbs moisture and provides cushioning, but it also becomes contaminated with feces and urine. In quarantine, you should clean the pen daily or every other day, not weekly. A deep bedding system does not work well for quarantine because you cannot see the floor condition and pathogens build up in the litter. ## Equipment for the Quarantine Area Dedicated equipment is a key part of quarantine design because it prevents you from carrying pathogens on shared tools. Keep a separate set of the following items in a locked cabinet or clearly marked bin near the quarantine pen: - Feed buckets and pans - Water buckets or automatic waterer - Halters and lead ropes - Hoof trimmers - Shears or clippers - Thermometer - Syringes and needles - Drenching equipment - Disinfectant spray and scrub brushes - Coveralls or a dedicated barn coat - Rubber boots - Gloves Label everything clearly so that no one accidentally uses quarantine equipment on the main flock. Color coding works well, such as red buckets and red handled tools for quarantine, and blue or green for the main flock. If you cannot afford a full second set of equipment, at least dedicate the items that touch the animals directly, such as halters, feeders, and hoof trimmers. After each quarantine period, clean and disinfect all equipment before storing it. Wash off organic material first, because disinfectants do not penetrate manure and dirt. Then soak or spray with a disinfectant appropriate for the diseases you are concerned about. Bleach solutions work for many viruses and bacteria but are corrosive and inactivated by organic matter. Quaternary ammonium compounds are good general disinfectants. Accelerated hydrogen peroxide products are effective and less corrosive. For footrot specifically, a copper sulfate or zinc sulfate footbath solution is useful, but check with your veterinarian about the best choice for your region. ## Biosecurity Protocols for People People are the most common vector for bringing disease from quarantine animals to the main flock. You can carry pathogens on your boots, your clothing, your hands, and your equipment. A solid biosecurity routine reduces this risk significantly. The basic rule is to work with the main flock first, then do quarantine chores last. This way, you are not moving directly from quarantine animals to healthy animals. If you have multiple quarantine groups at different stages, work with the oldest group first and the newest arrivals last, because the newest arrivals are the highest risk. Change your boots and coveralls before entering the quarantine area. Keep a pair of dedicated rubber boots at the quarantine pen entrance, and step into them only when you are about to work with those animals. When you leave, remove those boots and leave them in the quarantine area. If you must wear the same boots, step through a disinfectant footbath on the way out, but be aware that footbaths lose effectiveness quickly and should be refreshed daily. Wear gloves when handling quarantine animals, especially if you are examining them, giving injections, or treating feet. Dispose of gloves after each animal or after each session. Wash your hands with soap and water after removing gloves. If you are working with multiple quarantine animals, change gloves between animals if any animal shows signs of illness. If you have a sick animal in quarantine, consider using a separate set of coveralls that you only wear when treating that animal. This prevents you from carrying respiratory secretions or abscess material from the sick animal to the other quarantine animals. After treating a sick animal, wash your hands and change your outer layer before walking through the barn. Do not allow visitors, dogs, or other livestock species into the quarantine area. Dogs can carry pathogens on their feet and fur, and they can stress the sheep. Visitors have no reason to enter quarantine and increase the risk of accidental spread. Post a sign that clearly states the quarantine status and the rules for entry. ## Feed and Water in the Quarantine Pen New sheep need access to clean, fresh water at all times, especially after transport. Dehydration is common after a long trip, and a sheep that does not drink in the first 24 hours is at risk for urinary calculi and other problems. Provide water in a clean bucket or trough that is dedicated to the quarantine pen. Check it twice daily and refill as needed. In winter, check for freezing and provide warm water if possible, because sheep drink more when the water is not ice cold. Feed the new arrivals a good quality grass hay for the first few days. Do not switch them directly to your regular grain ration or silage. A sudden change in feed can cause digestive upset, acidosis, or enterotoxemia. Start with hay that is similar to what the sheep were eating at their source farm if you know it, then gradually transition to your normal ration over 7 to 10 days. If you are bringing in lambs that were on a high concentrate diet, you may need to provide a similar feed to prevent a setback. Offer a small amount of grain on the first day to see if the animal has an appetite. A sheep that refuses grain or hay may be sick, stressed, or simply not accustomed to that feed. Monitor intake closely for the first 72 hours. A healthy sheep should be eating within a few hours of arrival. If an animal goes more than 24 hours without eating, call your veterinarian. Provide a mineral supplement that is appropriate for your region. Selenium and copper levels vary widely across the country, and a new animal may be deficient or may receive too much if you provide a mineral that is not matched to your area. Check with your extension agent about local mineral recommendations. In general, a loose mineral formulated for sheep in your region is safer than a block, because blocks are often designed for cattle and contain the wrong copper and selenium levels for sheep. Do not feed quarantine animals on the ground. Use a feeder or a pan that keeps feed off the floor. Ground feeding spreads parasite eggs and allows contamination with feces. Clean the feeder daily and remove any uneaten feed before it molds or attracts flies. ## Health Assessment on Arrival The moment a new sheep arrives, you should perform a basic health assessment. This is the first step in your quarantine protocol and gives you a baseline for the rest of the isolation period. Do this in a calm, quiet manner to avoid stressing the animal further. Start by observing the animal from a distance. Look at its posture, gait, and behavior. A healthy sheep should be alert, standing squarely, and interested in its surroundings. A sheep that is lying down, reluctant to move, or holding its head low may be sick or exhausted. Check for nasal discharge, coughing, or labored breathing. Look at the eyes for cloudiness, discharge, or excessive blinking. Check the ears for signs of ear mites or infection. Then handle the animal for a closer examination. Check its body condition score on a scale of 1 to 5, with 3 being ideal. A thin animal may need extra nutrition and may have a parasite burden. Check its mucous membranes, the gums and the inside of the eyelids, for color. Pale membranes can indicate anemia from barber pole worm infection. Check the feet for lameness, heat, swelling, or odor. Footrot has a distinctive rotten smell, and any animal with foot odor should be isolated further and examined closely. Take the animal's temperature with a rectal thermometer. Normal temperature for sheep is 101.5 to 103.5 degrees Fahrenheit. A temperature above 104 suggests fever and infection. Check the feces for consistency and color. Diarrhea, blood, or mucus in the feces is a warning sign. Check the urine if you can, especially in wether lambs, for signs of straining or blood, which can indicate urinary calculi. Weigh the animal if you have a scale. Body weight is a useful baseline for dosing medications and for tracking weight gain during quarantine. If you do not have a scale, use a weight tape or estimate based on body condition. Record the weight, temperature, and all observations in your quarantine log. ## Diagnostic Testing During Quarantine A quarantine period is only useful if you do some testing. Observation alone will not detect subclinical infections. Talk to your veterinarian about which tests are appropriate for your region and for the source of your new animals. Some tests are inexpensive and worth doing on every arrival, while others are targeted to specific high risk situations. A fecal egg count is one of the most useful and affordable tests. Collect a fresh fecal sample from each animal or from a pooled sample of the group, and send it to a lab or use your own microscope if you are trained. The test tells you how many parasite eggs the animal is shedding. A high count means the animal needs deworming and is a contamination risk to your pasture or barn. A low count is reassuring. Run a second fecal egg count at the end of quarantine to confirm that deworming was effective and that the animal is not shedding resistant parasites. The American Consortium for [Small Ruminant Parasite Control](/knowledge/veterinary-medicine/food-animal-medicine/small-ruminant-parasite-control-diagnostic-strategies-anthelmintic-stewardship) offers guidance on fecal egg counting and deworming protocols. Blood tests can detect OPP, CL, and other diseases. OPP is a retrovirus that causes progressive pneumonia and wasting. It spreads through respiratory secretions and colostrum. There is no treatment, and infected animals should be culled to prevent spread. A blood test for OPP is available and is worth doing if you are adding animals to a closed flock. CL is a bacterial infection that causes abscesses in lymph nodes. It is highly contagious and difficult to eliminate from a flock once established. Blood tests for CL are available, but they can have false positives, so work with your veterinarian to interpret results. Johne's disease is another chronic wasting disease that can be detected with a blood test, and it is a serious concern for sheep producers. For footrot, a visual inspection is the first step, but the bacteria can be present without causing visible lesions. If you are bringing animals from a region known to have footrot, or if you have a footrot free flock and want to keep it that way, consider a more rigorous protocol. This may include a footbath on arrival, trimming all feet, and inspecting for lesions. Some producers take the additional step of testing for the specific bacteria that cause footrot, but this requires a [veterinary diagnostic lab](/blog/careers/veterinary-diagnostic-laboratory-careers-from-bench-to-leadership). Work with your veterinarian to create a testing protocol that fits your budget and your risk tolerance. A basic protocol for a small flock might include a fecal egg count on arrival, a physical exam, and observation for 30 days. A higher level protocol for a seedstock producer might include blood tests for OPP, CL, and Johne's disease, plus repeated fecal egg counts and foot inspection. ## Deworming and Vaccination in Quarantine Deworming new arrivals is a standard practice, but you should not deworm blindly. The rise of anthelmintic resistance means that treating every animal with the same product can select for resistant parasites. Instead, use a targeted approach based on fecal egg counts and body condition. If a fecal egg count shows a high parasite burden, treat the animal with an appropriate dewormer. Choose the dewormer based on what is known about resistance on your farm and in your region. If you have not done a [fecal egg count reduction test](/knowledge/diagnostics/parasitology/fecal-egg-count-reduction-test-for-anthelmintic-resistance), work with your veterinarian to select a product. After treatment, run a follow up fecal egg count 10 to 14 days later to confirm the dewormer worked. If the egg count did not drop significantly, the parasites may be resistant, and you need to try a different drug class. For animals with a low or moderate egg count, you may choose not to deworm. This preserves the effectiveness of the drugs for when they are truly needed. Instead, focus on good nutrition and a clean environment to help the animal's immune system control the parasites. Monitor the animal through quarantine and repeat the fecal egg count at the end of the period. Vaccination is another key part of the quarantine protocol. The core vaccines for sheep include Clostridium perfringens types C and D and tetanus, often given as a combined product. If the new animals have unknown vaccination history, give them a full course of two doses, 3 to 4 weeks apart. This fits well within a 30 day quarantine period. Some producers also vaccinate for caseous lymphadenitis, but the vaccine is not available in all regions, and its effectiveness is debated. Talk to your veterinarian about the appropriate vaccine protocol for your area. Do not vaccinate an animal that is already sick or severely stressed. The immune system needs to be functioning well to respond to the vaccine. Wait until the animal has settled in for a few days and is eating and drinking normally. If an animal develops a fever or signs of illness, postpone vaccination until it recovers. ## Managing Footrot and Hoof Care in Quarantine Footrot is one of the most economically damaging diseases in sheep, and it is commonly introduced through new animals. The bacteria that cause footrot survive in soil and on hoof tissue, and they can persist for weeks in damp conditions. A quarantine period is the ideal time to address foot health before the animals join your main flock. On arrival, trim all four feet of every new animal. This gives you a chance to inspect the hoof tissue for lesions, and it removes overgrown hoof that can trap dirt and bacteria. Use your dedicated quarantine hoof trimmers, and disinfect them between animals. If you find suspicious lesions, isolate that animal further and call your veterinarian for a diagnosis. If you are bringing animals from a source that has a history of footrot, or if you are in a footrot prone region, consider a preventive footbath. A 10 percent zinc sulfate solution or a copper sulfate solution can help kill bacteria on the hoof surface. Soak the feet for 5 to 10 minutes, then let the animal stand on a clean, dry surface. Repeat the footbath weekly during quarantine. Be careful with copper sulfate because it is toxic to sheep if ingested in large amounts, and it stains wool and concrete. After trimming, keep the quarantine pen as dry as possible. Footrot bacteria thrive in wet, muddy conditions. Change bedding frequently and ensure that the pen has good drainage. If you have a sick animal with active footrot, keep it on a separate dry surface and change the bedding daily. Treat the affected feet with a topical antibiotic or a footrot spray, and consider systemic antibiotics if the infection is severe. Your veterinarian can recommend the appropriate treatment. At the end of quarantine, trim the feet again and inspect for any new lesions. If all feet are clean and the animal has not shown lameness for at least two weeks, it is reasonable to introduce it to the main flock. If you have any doubt, extend quarantine by another two weeks. ## Common Mistakes in Quarantine Design Many producers make the same mistakes when setting up a quarantine area. Recognizing these problems can help you avoid them from the start. The most common mistake is treating quarantine as a simple holding pen rather than a disease barrier. The pen is placed in a corner of the barn with open fencing, and animals can touch noses through the gate. This defeats the purpose of quarantine for respiratory diseases and some bacterial infections. Solid partitions and adequate distance are essential. Another mistake is sharing equipment between the quarantine pen and the main flock. A single pair of hoof trimmers or a single feed bucket can carry pathogens from the new animals to the established flock. Even if you clean the equipment, it is safer to have a dedicated set. The cost of a few extra buckets and tools is far less than the cost of a disease outbreak. Skipping the diagnostic testing is a third common mistake. Some producers rely on visual observation alone, assuming that a sheep that looks healthy is healthy. Many diseases have a long incubation period, and an animal can appear completely normal while shedding pathogens. Fecal egg counts and blood tests are inexpensive compared to the cost of treating an established disease problem. A fourth mistake is cutting the quarantine period short. Producers feel pressure to get new animals into the main flock, especially if they are needed for breeding or if space is tight. But a 10 day quarantine is not enough to detect most diseases. The minimum should be 21 days, and 30 days is better. For high value animals or when bringing animals from a high risk source, 60 days is justified. Failing to clean and disinfect between groups is another serious error. If you use the same pen for multiple groups without a thorough cleaning, pathogens accumulate and each new group is at higher risk. The quarantine pen should be treated as a clean room between groups, with a full wash down, disinfection, and a dry period before new animals arrive. ## Cleaning and Disinfecting the Quarantine Pen A proper cleaning protocol between quarantine groups is essential. The process has three stages: remove organic material, wash, and disinfect. Each stage is necessary, and skipping one reduces the effectiveness of the whole process. Start by removing all bedding, manure, and feed debris from the pen. Use a shovel and a scraper to get the pen as clean as possible. This organic material contains the bulk of the pathogens, and it also inactivates disinfectants. Dispose of the waste in a way that does not contaminate grazing areas or the main barn. Composting the manure can kill many pathogens if the pile heats properly, but footrot bacteria and some viruses may survive, so check with your extension agent about safe disposal. After removing the organic material, wash the pen with water and a detergent. A pressure washer is ideal because it dislodges material from cracks and pores. Use a detergent that is effective at breaking down organic matter. Pay special attention to corners, around feeders, and along wall bases where material accumulates. Rinse thoroughly with clean water after washing. Then apply a disinfectant. Choose a product that is effective against the pathogens you are concerned about. A broad spectrum disinfectant such as accelerated hydrogen peroxide or a phenolic product is a good choice for general use. Bleach is effective but corrosive and inactivated by organic matter, so it is only useful after a thorough cleaning. Follow the label directions for dilution and contact time. Most disinfectants need to stay wet on the surface for 10 to 15 minutes to work. After disinfecting, allow the pen to dry completely before bringing in new animals. Sunlight and dry conditions help kill remaining pathogens. If possible, leave the pen empty for a week or more between groups. This rest period allows any surviving organisms to die off and reduces the risk of carryover. Do not forget to clean and disinfect the equipment, the gate, the latch, and the floor drain. These are easy to overlook but can harbor pathogens. Wash the walls up to a height of at least 4 feet, because sheep can splash urine and feces onto lower wall surfaces. If the pen has a concrete floor, check for cracks and repair them, because pathogens can hide in damaged surfaces. ## Monitoring and Recordkeeping During Quarantine Daily monitoring is the heart of a successful quarantine period. You should check the quarantine animals at least twice a day, once in the morning and once in the evening. The monitoring routine should be consistent and documented, so that you notice changes early. At each check, observe the animals before entering the pen. Look at their posture, activity level, and social behavior. A sheep that is separated from the group, lying down, or not coming to the feeder may be sick. Check for coughing, nasal discharge, or labored breathing. Look at the feces for changes in consistency or color. Check the waterer to confirm that the animals are drinking. When you enter the pen, do a closer inspection. Run your hands over each animal to check body condition and to feel for any lumps or swellings. Check the feet for lameness or heat. Look at the eyes and mucous membranes. Take the temperature of any animal that appears off. Weigh the animals weekly to track weight gain. Keep a written record for each animal in quarantine. The record should include the arrival date, the source farm, the animal's identification tag or name, the initial weight and body condition score, the results of any tests, any treatments given, and daily observations. A simple notebook or a spreadsheet works well. The record is not just for your own reference. It is essential if you need to trace a disease outbreak back to its source, and it helps you make decisions about whether to introduce an animal to the main flock. At the end of quarantine, review the records for each animal. An animal that has gained weight, had normal temperatures, and tested negative for the diseases you screened is ready to join the main flock. An animal that has had recurrent health problems, failed to thrive, or tested positive for a serious disease should not be introduced. You may need to extend quarantine, treat the animal further, or cull it. ## Decision Thresholds for Extending Quarantine Not every animal completes quarantine on the original schedule. You need clear criteria for extending the isolation period. The following situations warrant an extension of at least 14 days: - The animal shows signs of respiratory disease, such as coughing, nasal discharge, or fever, within the first two weeks of quarantine. The incubation period for many respiratory pathogens is longer than 14 days, so an animal that appears sick early may still be contagious. - The animal has a positive blood test for OPP, CL, or Johne's disease. A positive test does not always mean the animal is actively shedding disease, but it does mean the animal is infected and should not join a clean flock. You need to decide whether to cull or to keep the animal separate permanently. - The animal has footrot lesions that do not respond to treatment within two weeks. Footrot can be stubborn, and a treated animal may still be contagious. Keep it separate until all lesions are healed and the feet have been clean for at least two weeks. - The animal has a high fecal egg count at the end of quarantine, even after deworming. This suggests the animal is carrying resistant parasites. You should not introduce it to your main flock or your pasture until you have addressed the parasite issue. - The animal shows signs of any contagious disease, such as abscesses, eye discharge, or diarrhea. These signs can indicate conditions that are easily spread to the rest of the flock. When you extend quarantine, document the reason and the new end date. Continue the same monitoring and testing protocols. Do not let the extended quarantine lapse into a holding pen situation where you stop checking the animals daily. The extended period is an opportunity for further observation and treatment, not a reason to relax your routine. ## Introducing Quarantine Animals to the Main Flock The end of quarantine is not the end of the process. How you introduce the new animals to the main flock affects their health and the flock's social stability. A sudden introduction into a crowded pen can cause fighting, injury, and stress, which lowers immunity and increases disease risk. Before introducing the new animals, make sure they are healthy and have completed all treatments. Review your records and confirm that the quarantine period is complete. Then plan the introduction. The best method is to put the new animals in a pen adjacent to the main flock for a few days, with solid fencing that allows them to see and smell each other but not fight. This reduces the shock of a sudden meeting. When you are ready to mix the animals, do it in a neutral area if possible. A pasture or a large pen that neither group has been using for a few days is ideal. Provide plenty of space so that the animals can avoid each other if they want. Have extra feed and water stations so that the new animals are not blocked from resources. Watch the group closely for the first few hours. Some head butting and chasing is normal as the animals establish a hierarchy, but if an animal is being relentlessly attacked and cannot escape, separate it and try again later. Monitor the new animals closely for the first week after introduction. The stress of mixing can trigger disease, especially if the animals were carrying a subclinical infection. Check for coughing, lameness, and reduced appetite. If any animal shows signs of illness, remove it from the group and place it back in the quarantine area until you can diagnose the problem. ## Seasonal Considerations for Quarantine Design The time of year affects how you design and manage your quarantine area. In summer, heat stress is a concern, especially for sheep with heavy fleece. The quarantine pen should have shade and good airflow. If the pen is inside a barn, ensure that ventilation is adequate and that the animals are not crowded. Provide cool, clean water and consider shearing animals that arrive with a heavy fleece, but only if they are healthy enough for the stress. In winter, cold and damp are the main challenges. The quarantine pen should be draft free but still ventilated to prevent ammonia buildup. Provide deep, dry bedding and check it frequently. Newly arrived sheep may be wet from transport and need extra time to dry off. A heat lamp can help lambs and shorn sheep, but use it with caution and place it well away from bedding and walls. Spring and fall are the seasons when parasite pressure is highest on pasture. If you are quarantining animals during these times, pay extra attention to fecal egg counts and to keeping the pen clean. The new animals may be shedding parasite eggs that could contaminate your barn environment, so daily manure removal is especially important. The source of your animals also affects your quarantine protocol. Animals from a sale barn or an auction market are higher risk than animals from a known producer with a closed flock. Sale barn animals may have been mixed with animals from many different farms and may have been stressed and exposed to multiple diseases. If you buy at auction, plan for a longer quarantine of 45 to 60 days and a more comprehensive testing protocol. ## Working with Your Veterinarian and Extension Agent A quarantine plan is not something you have to design alone. Your veterinarian and your local extension agent can help you create a protocol that fits your specific situation. They know the disease risks in your region and can recommend the right tests and treatments. Before you bring new animals onto your farm, talk to your veterinarian about your quarantine plan. Ask about the specific diseases that are a concern in your area and what tests are recommended. Your veterinarian can also help you interpret test results and make decisions about culling or treatment. If you do not have a regular veterinarian who works with sheep, ask your extension agent for a referral. Your extension agent can provide information about local disease prevalence, parasite resistance, and best management practices. The American Consortium for [Small Ruminant Parasite Control](/knowledge/veterinary-medicine/food-animal-medicine/small-ruminant-parasite-control-diagnostic-strategies-anthelmintic-stewardship) is a valuable resource for parasite management, and the USDA APHIS Sheep Health program offers information on reportable diseases and national disease control efforts. The Food and Agriculture Organization of the United Nations also publishes resources on sheep and goat production and animal health. The World Organisation for Animal Health provides global disease surveillance information. When you call your veterinarian during a quarantine period, be prepared to describe the situation clearly. Have your records handy, including the animal's temperature, appetite, and any treatments given. Describe the signs you are seeing and how long they have been present. This information helps the veterinarian make a more accurate assessment over the phone, and it helps you decide whether an emergency visit is needed. ## When to Call a Veterinarian Some situations during quarantine require immediate professional help. Do not wait to see if a problem resolves on its own. The following are clear signs that you should call your veterinarian: - A sheep has a temperature above 104 degrees Fahrenheit and is not eating or drinking. - A sheep is unable to stand or is severely lethargic. - A sheep has difficulty breathing, with rapid, shallow breaths or open mouth breathing. - A sheep has blood in its feces or urine. - A ewe has a vaginal discharge that is foul smelling or contains blood. - A sheep has a visible abscess or swelling that is hot and painful. - A sheep is straining to urinate and cannot pass urine, which is an emergency in wether lambs. - A sheep has a severe injury, such as a deep cut, a broken bone, or a prolapse. - Multiple animals in the quarantine group are showing the same signs of illness, which suggests a contagious disease. If you are unsure whether a situation is an emergency, call your veterinarian and describe what you are seeing. It is better to make a call that turns out to be unnecessary than to delay treatment for a serious condition. Your veterinarian can advise you on whether to bring the animal in, whether to start treatment at home, or whether to continue monitoring. ## Frequently Asked Questions **How long should I quarantine new sheep?** The minimum quarantine period is 21 days, and 30 days is the standard recommendation for most flocks. Some diseases have longer incubation periods, so a 60 day quarantine is justified for high value animals, for animals from sale barns, or when you are trying to maintain a closed flock free of specific diseases like OPP or footrot. The quarantine period is only useful if you are actively monitoring the animals and running diagnostic tests. A longer quarantine with no testing is not better than a shorter one with proper testing. **Can I quarantine sheep in the same barn as my main flock?** Yes, but you need to be careful about the design. The quarantine pen should be at least 30 feet from the main flock, with solid partitions that prevent nose to nose contact. Ideally, the quarantine pen has its own airspace or is positioned so that air flows from the main flock toward the quarantine area, not the other way. You also need to manage your own traffic, working with the main flock first and changing boots and clothing before entering the quarantine area. **Do I need to test for OPP and CL on every new sheep?** Testing for OPP and CL is recommended if you are adding animals to a clean flock or if you are a seedstock producer who sells breeding animals. These diseases are slow to develop and can be present without visible signs. A blood test is relatively inexpensive and can prevent a serious problem years down the road. For commercial operations with a lower investment per animal, testing may be less cost effective, but you should still understand the disease status of the source flock. Talk to your veterinarian about your specific risk. **What is the best way to deworm new sheep?** Do not deworm blindly. Run a fecal egg count first to determine if the animal actually needs treatment. If the egg count is high, treat with an appropriate dewormer and then run a follow up test 10 to 14 days later to confirm the treatment worked. If the egg count is low, skip the treatment and focus on nutrition and a clean environment. This approach reduces the selection pressure for anthelmintic resistance, which is a growing problem in [sheep parasites](/knowledge/parasites/livestock-parasites/common-sheep-parasites-eggs-treatment). **Can I use a dirt floor for a quarantine pen?** A dirt floor is not recommended because it cannot be effectively disinfected. Parasite eggs and footrot bacteria persist in soil, and they will infect the next group of animals that uses the pen. If you have no choice but to use a dirt floor, remove the top 4 inches of soil between groups and replace it with clean fill. This is a temporary solution, and you should plan to install a concrete or sealed floor as soon as possible. **What should I do if a quarantine animal dies?** If an animal dies during quarantine, you need to determine the cause of death before introducing any other animals to the main flock. Call your veterinarian and arrange for a necropsy, especially if the cause is not obvious. The necropsy can identify contagious diseases that could affect the rest of your flock. Dispose of the carcass according to local regulations, which may include burial, composting, or rendering. Do not leave the carcass where scavengers can access it. Clean and disinfect the quarantine pen thoroughly before using it again. **Can I introduce a single new sheep directly into my flock after quarantine?** You can, but a gradual introduction is less stressful and reduces the risk of fighting and injury. Put the new sheep in a pen adjacent to the main flock for a few days so the animals can see and smell each other. Then introduce the new sheep into a neutral area with plenty of space and multiple feed and water stations. Watch the group closely for the first few hours and be prepared to separate the new sheep if it is being attacked. **How often should I clean the quarantine pen?** Clean the quarantine pen daily or every other day, depending on how many animals are in it and how much manure they produce. Remove soiled bedding and manure, and add fresh bedding to keep the lying area dry. At the end of the quarantine period, do a full cleaning and disinfection, including washing the walls and floor, before the next group of animals arrives. ## Related Farming Guides This section will be populated with links to related farming guides on sheep health, barn design, and biosecurity. Check back for updated resources on flock management, parasite control, and disease prevention. ## Related Clinical & Scientific Guides * [Sheep Grazing Lease: Terms, Rates, and Legal Considerations](/knowledge/animal-farming/sheep/sheep-grazing-lease-terms-rates-and-legal-considerations) * [Sheep Breed Selection for Meat, Wool, Dairy, and Low-Input Systems](/knowledge/animal-farming/sheep/sheep-breed-selection-for-meat-wool-dairy-and-low-input-systems) * [Sheep Barn Flooring for Hoof Health: Best Materials and Practices](/knowledge/animal-farming/sheep/sheep-barn-flooring-hoof-health-materials-practices) ## References - American Consortium for Small Ruminant Parasite Control (ACSRPC): https://www.wormx.info/ - USDA APHIS Sheep Health: https://www.aphis.usda.gov/livestock-poultry-disease/sheep-goats - FAO Sheep and Goat Production: https://www.fao.org/animal-production/en/ - FAO Animal Production and Health: https://www.fao.org/animal-production/en/ - WOAH (World Organisation for Animal Health): https://www.woah.org/en/home/ > This article is educational and is not a substitute for veterinary diagnosis, treatment, public-health guidance, or regulatory reporting.