# Feedlot Sick Pen Design and Isolation ## Key Takeaways - **Strategic Location and Capacity:** Sick pens should be visible from main working areas, drain away from healthy cattle, and be sized at 2-5% of total pen capacity (e.g., 20-50 spaces for a 1,000-head feedlot), accounting for season and cattle risk factors (e.g., commingled calves). - **Zoned Design for Disease Control:** A functional sick pen requires three distinct zones: a concrete treatment area with a head gate for efficient handling and disinfection, a dry, sheltered recovery pen with ample bunk and water access (18-24 inches bunk space/animal, 1 waterer/10-15 animals), and a physically separate chronic/isolation pen with independent drainage and equipment for contagious cases. - **Surface and Drainage are Critical:** Compacted limestone or gravel bases with a 2-4% slope are recommended for recovery pens to ensure rapid runoff, preventing mud and dust which exacerbate respiratory and digestive pathogens; concrete is essential for the treatment area for hygiene. - **Isolation Protocols for Contagious Disease:** True isolation pens must be physically separated (50-100 ft) with independent drainage and equipment to prevent transmission of highly infectious agents like bovine viral diarrhea virus (BVDV) or *Mannheimia haemolytica*, and require strict protocols for entry, duration, and exit. - **Proactive Management and Recordkeeping:** Written protocols for daily observation (minimum twice daily checks with a health scoring system), treatment, euthanasia criteria, and biosecurity (dedicated equipment, disinfection) are paramount; meticulous recordkeeping of treatments, retreats, deaths, and euthanasia informs protocol efficacy and identifies disease trends. - **Biosecurity and Personnel Safety:** Dedicated equipment (pitchforks, shovels, tractor buckets) and disinfection protocols for the sick pen are crucial to prevent pathogen spread; designing for human safety with adequate lighting, non-slip surfaces, and unobstructed movement in the treatment area improves compliance and efficiency. --- A well designed feedlot sick pen is the difference between a quick recovery and a costly outbreak. This guide covers the planning, layout, and management of hospital pens for feedlot cattle. It is written for feedlot owners, managers, and crew leads who are designing a new facility or upgrading an existing one. ## At a Glance - **Location matters most.** Place the sick pen where you can see it from the main working area and where it drains away from healthy cattle. - **Plan for 2 to 5 percent of pen capacity.** A 1,000 head feedlot needs 20 to 50 hospital spaces depending on season and health history. - **Separate the hospital into three zones.** A treatment area, a recovery pen, and a chronic or isolation pen prevent disease spread and protect recovering cattle. - **Surface and drainage are non negotiable.** Use a compacted base with good slope and a plan for manure and runoff management. - **Bunk and water access must be individual.** Sick cattle need easy access to fresh feed and water without competing with pen mates. - **Write your protocols before you build.** Treatment records, daily observation schedules, and euthanasia criteria should guide the design, not the other way around. - **Isolation is a separate function.** A true isolation pen is for cattle with suspected contagious disease. It needs its own drainage and its own equipment. ## Why the Sick Pen Is a Core Feedlot System The sick pen is not a spare corner of the lot. It is a working part of the health program. Every animal that enters the feedlot passes through a risk window in the first 28 to 45 days. Respiratory disease, digestive upset, and injury all bring cattle to the hospital pen. How that pen is built and run determines how quickly cattle recover and how much disease spreads to the rest of the pen. A good hospital facility gives you three things. First, it gives sick cattle a place to rest without competition. Second, it gives you a place to treat and observe cattle safely and efficiently. Third, it keeps sick animals from contaminating the environment of healthy animals. A poor hospital facility does the opposite. It hides sick cattle from view. It lets runoff carry pathogens into other pens. It forces cattle to stand in mud or dust. It makes treatment dangerous for people and cattle. It delays care because the pen is hard to work. Feedlot consultants and veterinarians consistently rank hospital pen design among the most overlooked parts of feedlot infrastructure. Producers spend heavily on the main pens, the processing facility, and the feed mill, then treat the sick pen as an afterthought. That is a costly mistake. The sick pen handles your highest risk animals and your highest cost animals. It deserves deliberate planning. ## Planning the Feedlot Sick Pen ### Step 1: Determine Your Hospital Capacity The size of your sick pen depends on the number of cattle you feed, the time of year you receive cattle, and your historical morbidity rates. Morbidity is the percentage of cattle that get sick and require treatment. In many feedlots, that number runs from 5 to 15 percent over the feeding period. Some pens and some seasons run much higher. A practical planning number is 2 to 5 percent of your one time capacity. A 1,000 head feedlot should have space for 20 to 50 sick cattle at one time. If you receive cattle in large groups during high stress seasons, plan for the upper end of that range. If you run a smaller operation with lower risk cattle and a steady intake pattern, the lower end may work. Your hospital capacity should also account for the type of cattle you feed. High risk calves from sale barns will need more hospital space than yearlings from a single ranch. Lightweight calves, recently weaned calves, and calves that have been commingled at auction are all higher risk. ### Step 2: Choose the Location The sick pen location affects daily observation, treatment efficiency, and disease control. The ideal location meets several criteria at once. Place the hospital where you can see it from your main traffic areas. That might be from the feed truck path, the office, or the main processing barn. The goal is that someone looks at the sick pen every time they drive through the lot. A hidden sick pen gets checked less often, and delayed detection is the enemy of treatment success. Place the hospital near the working facility but not directly adjacent to it. You want a short haul for sick cattle, but you do not want the hospital to interfere with processing. A distance of 100 to 300 feet from the main chute area is a reasonable target. That gives you a short drive with a tractor or a cart while keeping the two functions separate. Place the hospital so that drainage moves away from healthy cattle. Water that runs off the sick pen should not flow into or across other pens. If you are on flat ground, you may need to build a slight mound or a diversion berm to direct runoff. If you are on a slope, place the hospital at the lower end of the lot so runoff from healthy pens does not pass through the hospital. Place the hospital downwind of the main lot if possible. This reduces dust and odor issues for the rest of the cattle and for your neighbors. It also reduces the chance of airborne pathogen movement, though the main disease transmission routes are direct contact and contaminated equipment. ### Step 3: Design the Layout A functional hospital facility has three distinct areas. They can be in the same building or in separate pens, but they must be planned as separate functions. **Treatment area.** This is where you work cattle. It needs a head gate or a small chute, a working alley, and enough room for one person to move around the animal safely. The treatment area should have a solid floor that you can clean and disinfect. Concrete is the standard choice. It should have a roof to keep rain and sun off both the cattle and the people working there. **Recovery pen.** This is where cattle go after treatment. They are still sick, but they are stable and need rest, feed, and water. The recovery pen should be dry, sheltered from wind, and large enough that cattle can lie down and get up without being stepped on. You need enough space for the number of cattle you expect to have in recovery at one time. **Chronic or isolation pen.** This is for cattle that are not responding to treatment, cattle with suspected contagious disease, and cattle that need a longer convalescence. This pen should be physically separate from the recovery pen. It should have its own drainage and its own equipment if possible. Cattle that stay here for more than a few days need a clear plan for treatment, recheck, or euthanasia. The three areas do not need to be large. A treatment area of 10 by 20 feet can handle a busy day. A recovery pen of 20 by 30 feet can hold 10 to 15 calves. The key is that the areas are distinct and that cattle do not move freely between them. ### Step 4: Select Surfaces and Drainage The surface of the sick pen is a health decision, not just a construction decision. Dirt pens are the cheapest to build but the hardest to keep clean and dry. When a dirt pen gets wet, it becomes mud. Mud coats cattle, increases their energy needs, and creates an environment where bacteria thrive. When a dirt pen is dry, it becomes dust. Dust irritates the respiratory tract and can make respiratory disease worse. A compacted limestone or gravel base is a common and practical choice. It drains well, stays firmer than dirt, and is easier to keep clean than bare soil. You can add a layer of finer material on top to make it more comfortable for cattle to lie on. For the treatment area, concrete is the right choice. It is easy to clean, easy to disinfect, and gives you solid footing for working cattle. A concrete apron in front of the head gate and along the working alley is worth the cost. Drainage is the most important part of the surface design. The pen should slope at least 2 to 4 percent so water runs off quickly. That is roughly 2 to 4 feet of fall for every 100 feet of length. You need a plan for where that water goes. It should go to a collection area or a vegetative filter strip, not into the next pen and not into a drainage ditch that carries it to a waterway. Manure management is part of drainage planning. A sick pen produces manure that may contain pathogens. You need a way to remove and store that manure so it does not become a source of re infection. A concrete pad that you can scrape with a skid steer is the simplest system. You can also use bedding in the recovery pen and remove the soiled bedding regularly. ### Step 5: Plan Feed and Water Sick cattle need easy access to feed and water. That sounds obvious, but many hospital pens are designed with a single bunk that runs along one side, forcing all cattle to compete for space. A sick animal may not be willing to push through a crowd to reach the bunk. Provide at least 18 to 24 inches of bunk space per animal in the recovery pen. That is two to three times the bunk space you provide in a regular pen. The goal is that every animal can stand at the bunk at the same time if they want to. Water is even more important. Sick cattle, especially those with fever or diarrhea, can become dehydrated quickly. Provide at least one water tank or automatic waterer for every 10 to 15 animals in the hospital. Place the water so that cattle do not have to walk far and so that the waterer is easy to clean. Consider adding an electrolyte or supplement station in the hospital. Some operations use a separate small tank where they can offer medicated water or electrolytes to newly arrived sick cattle. This is not a substitute for individual treatment, but it can support recovery. ### Step 6: Build for People The sick pen is a workplace. The people who treat cattle need to move cattle safely, carry equipment, and keep records. A hospital that is awkward to work in will not be used properly. Design the treatment area so that a person can move around the animal without being trapped against a fence or a wall. Provide a catch pen or a small holding area where you can sort cattle before they enter the chute. Make sure the head gate is easy to operate from both sides. Lighting matters. If you treat cattle in the early morning or late evening, you need lights that let you see what you are doing. A well lit treatment area is safer for both people and cattle. Storage is part of the design. You need a place for syringes, needles, medications, and treatment records. A small locked cabinet or a shelf in a nearby shed keeps supplies organized and protected from weather and theft. A refrigerator for vaccines and medications is essential if you use products that require cold storage. ## Isolation Pens for Contagious Disease Isolation is a separate function from the routine hospital pen. A true isolation pen is for cattle with suspected contagious disease. That includes animals with signs of respiratory disease that are not responding to treatment, animals with diarrhea that may be viral or bacterial, and any animal with unusual lesions or signs that you cannot identify. The isolation pen should be physically separated from the main hospital by at least 50 to 100 feet. It should have its own drainage that does not connect to the hospital drainage or the main lot drainage. It should have its own equipment. That means its own feed bunk, its own water tank, and ideally its own tools for handling. The reason for this separation is simple. The hospital pen already contains sick animals. If you put a contagious animal in with them, you may create a secondary outbreak. The isolation pen breaks that chain. You also need a protocol for the isolation pen. What signs trigger moving an animal there? How long does an animal stay? What happens when the animal recovers? A clear protocol prevents the isolation pen from becoming a place where animals are forgotten. A common mistake is to use the isolation pen as a chronic pen. An animal that is not responding to treatment but is not contagious should stay in the hospital or move to a separate chronic pen. The isolation pen should be reserved for animals that pose a risk to others. ## Working the Sick Pen ### Daily Observation The sick pen needs at least two checks per day during high risk periods. A morning check and an evening check are the minimum. During peak respiratory disease season, a midday check is a good idea. Each check should include a walk through the pen. Look at every animal. Note which ones are standing and which are lying down. Watch for animals that are not eating, not coming to the bunk, or showing signs of depression. Look for coughing, nasal discharge, and labored breathing. Check for diarrhea and check the water tank. The person doing the checks needs to know what to look for. A simple scoring system helps. The classic system scores cattle from 1 to 4. A score of 1 is normal. A score of 2 shows mild depression. A score of 3 shows obvious illness with depression, reduced appetite, and possibly a cough. A score of 4 is a severely sick animal that needs immediate attention. Set a threshold for pulling cattle. That threshold should be written down and understood by everyone who works the pens. For example, any animal with a score of 3 or higher comes to the hospital. Any animal with a score of 2 that does not improve within 24 hours also comes to the hospital. ### Treatment Protocols Treatment protocols should be written before you need them. Work with your veterinarian to develop protocols for the diseases you expect to see. The protocols should include the drug, the dose, the route, the withdrawal time, and the recheck interval. The treatment area should have a written protocol chart posted where the person treating can see it. That chart should include the drugs you use, the doses for different weight ranges, and the withdrawal times. It should also include the recheck schedule and the criteria for moving an animal to the chronic pen or for calling the veterinarian. One person should be responsible for treatment records. That person records the animal ID, the date, the drug, the dose, the route, and the response. This record is essential for tracking treatment success and for avoiding drug residues. ### Handling Sick Cattle Sick cattle need calm, gentle handling. They are already stressed. Rough handling makes them worse. Move sick cattle slowly and quietly. Do not use dogs in the hospital area. Do not use electric prods unless there is no other option. The treatment area should be designed for low stress handling. A solid sided alley reduces visual distraction. A non slip floor prevents falls. A head gate that opens and closes smoothly prevents injury. The person working the head gate should be trained and experienced. When you treat an animal, work efficiently. Have the drug drawn up before the animal is in the chute. Have the syringe and needle ready. The less time the animal spends in the chute, the better. ### Monitoring and Recordkeeping The sick pen generates data that should inform your management decisions. Track the number of animals treated, the number retreated, the number that die, and the number that are euthanized. Track the days on feed when animals get sick. Track the response to treatment by drug and by condition. This data tells you several things. It tells you whether your treatment protocols are working. It tells you whether your cattle source is getting better or worse. It tells you whether your receiving program is effective. It tells you whether the hospital pen is working as designed. Keep treatment records in a format that is easy to use. A paper log book works for a small operation. A spreadsheet works for a medium operation. A feedlot software program works for a large operation. The format matters less than the consistency. Every treatment gets recorded. Every death gets recorded. Every euthanasia gets recorded. Review the records monthly. Look for trends. If the number of retreats is going up, your treatment protocol may need to change. If the number of deaths is going up, your cattle source or your receiving program may need attention. If the number of animals going to the chronic pen is high, you may be pulling animals too late. ### Euthanasia and Chronic Cattle Every feedlot needs a euthanasia protocol. It is not a pleasant topic, but it is a necessary one. Cattle that are severely injured, chronically ill, or not responding to treatment need a humane end. The protocol should be written with your veterinarian and should follow accepted standards. The decision to euthanize is based on several factors. The animal's prognosis is the main factor. An animal that is not improving after two or three treatments has a poor prognosis. The animal's pain and suffering matter. An animal that cannot stand, cannot eat, or is in obvious distress needs to be euthanized promptly. The animal's value matters, but it should not be the only factor. The chronic pen is a holding area for animals that need more time. Some animals recover slowly and need weeks of convalescence. The chronic pen gives them that time without the stress of the main hospital. But the chronic pen should have a time limit. If an animal has not improved after a set period, usually 7 to 14 days, it is time to call the veterinarian or make the euthanasia decision. ## Common Mistakes in Sick Pen Design **Building the sick pen too far from the working area.** If the hospital is a long drive from the chute, you will be tempted to leave sick cattle in the home pen. That delays treatment and lets disease spread. **Making the pen too small.** A crowded hospital pen is a stressor. Cattle cannot rest, cannot reach feed and water, and are more likely to injure each other. **Ignoring drainage.** A hospital pen that holds water is a disease factory. Mud and standing water harbor pathogens and make cattle miserable. **Using the same equipment in the hospital and the main lot.** Shared equipment spreads disease. If you use the same tractor bucket to clean the hospital and feed the main pens, you are moving pathogens around the lot. **Forgetting about people.** A hospital that is dark, muddy, and hard to work will not be used properly. Build for the people who work there. **No written protocols.** If you do not have written treatment and observation protocols, you are relying on memory and habit. That is not good enough for a health critical facility. **Using the isolation pen as a catch all.** The isolation pen is for contagious disease. If you put every problem animal in the isolation pen, you defeat its purpose. **No plan for dead stock.** The hospital area needs a plan for dead animal removal. A dead animal that sits in the hospital pen is a disease risk and a morale problem. ## Decision Thresholds for the Sick Pen You need clear decision thresholds for several situations. Write them down and post them in the treatment area. **When to pull an animal from the home pen.** Use a health scoring system. Any animal with a score of 3 or higher comes to the hospital. Any animal with a score of 2 that does not improve in 24 hours comes to the hospital. **When to retreat an animal.** Follow your treatment protocol. Most protocols call for a recheck at 24 to 48 hours after the first treatment. If the animal has not improved, you retreat with a different drug class or you call the veterinarian. **When to move an animal to the chronic pen.** An animal that has been treated two or three times without a good response should move to the chronic pen. This frees up hospital space and gives the animal a quieter place to recover. **When to call the veterinarian.** Call the veterinarian when you have an animal that is not responding to your protocols, when you have an unusual disease presentation, when you have a high death loss, or when you are unsure about a diagnosis. It is always better to call too early than too late. **When to euthanize.** Follow your written protocol. The general criteria are an animal that cannot stand, an animal that is not eating or drinking, an animal with severe injury or disease that has a poor prognosis, and an animal that has not improved after a reasonable treatment period. ## Seasonal and Operational Considerations The sick pen needs change with the season. In the winter, you need wind protection and a dry surface. A windbreak on the north and west sides of the hospital is worth the cost. Bedding in the recovery pen helps cattle stay warm and dry. In the summer, you need shade and airflow. A shade structure over part of the recovery pen is important in hot climates. The type of cattle you feed changes the hospital needs. High risk calves need more hospital space and more intensive observation. Low risk yearlings need less. Cattle that arrive in the fall and winter face more respiratory disease pressure. Cattle that arrive in the spring and summer face more digestive issues if they are started on high energy rations too quickly. Your hospital capacity should flex with your intake schedule. If you receive a large group of high risk calves, the hospital will fill up quickly. Plan for that surge. Have extra pens ready and have extra help scheduled for the first 30 days after arrival. ## Biosecurity for the Hospital Area The hospital is a high risk area for disease spread. Biosecurity starts with the design. Separate drainage, separate equipment, and separate personnel if possible. If you cannot dedicate personnel, at least work the hospital last in the day so you do not move pathogens from the hospital to healthy pens. Disinfect equipment between uses. The head gate, the chute, and the working alley should be cleaned and disinfected regularly. A pressure washer and a disinfectant that works in organic material are essential tools. Control traffic into the hospital. Do not let visitors walk through the hospital area. Do not let the feed truck drive through the hospital if it also serves healthy pens. Keep a dedicated set of boots or shoe covers for the hospital area. Rodent and bird control matter in the hospital. Rodents and birds can carry pathogens between pens. Keep the hospital area free of spilled feed and standing water. ## When to Call a Veterinarian or Extension Agent You should have a relationship with a veterinarian before you need one. That veterinarian should help you write your treatment protocols, review your records, and visit your facility on a regular schedule. Call the veterinarian immediately in these situations. You have an animal with signs of a foreign animal disease, such as unusual lesions, high fever with no obvious cause, or sudden death in multiple animals. You have a disease that is not responding to your treatment protocols. You have a high death loss in a short period. You are unsure about a diagnosis or a treatment decision. Your veterinarian can also help with the design of your hospital facility. A veterinarian who knows your operation can point out design flaws and suggest improvements. That advice is worth more than the cost of the visit. Your local extension agent can help with the planning side. Extension services offer resources on facility design, manure management, and biosecurity. They can also connect you with other producers who have built successful hospital facilities. ## Case Example: A Practical Hospital Layout To make the design concrete, here is an example of a hospital layout for a 1,000 head feedlot. The hospital sits at the southwest corner of the lot, downwind of the main pens. It is 200 feet from the main processing barn. The area slopes gently to the south, and runoff goes to a vegetated filter strip. The treatment area is a 10 by 20 foot concrete pad with a roof. It has a head gate, a small alley, and a catch pen that holds 5 to 6 calves. A cabinet holds drugs, syringes, and treatment records. A refrigerator stores vaccines. The recovery pen is 20 by 40 feet with a compacted limestone base. It has a three sided shed on the north side for winter wind protection. A shade cloth covers the south half for summer. The bunk runs along the east side with 24 inches of space per animal. Two water tanks sit along the west fence. The chronic and isolation pen is 100 feet south of the recovery pen. It is 20 by 30 feet with its own drainage. It has a separate bunk and water tank. A sign on the gate reminds workers which animals belong in this pen and what the recheck schedule is. The hospital has its own set of tools. A dedicated pitchfork, shovel, and bucket stay in the hospital area. The skid steer bucket used to clean the hospital is washed before it is used anywhere else. The protocols are posted on a whiteboard in the treatment area. The whiteboard lists the drugs, doses, withdrawal times, and recheck schedule. It also lists the criteria for moving animals to the chronic pen and the criteria for calling the veterinarian. This layout is not the only good design, but it shows the principles in practice. The hospital is close to the working area. It has distinct zones. It drains away from healthy cattle. It has dedicated equipment. It has written protocols. ## Frequently Asked Questions **How big should a feedlot sick pen be?** Plan for 2 to 5 percent of your one time capacity. A 1,000 head feedlot needs 20 to 50 hospital spaces. If you feed high risk calves or receive cattle in large groups, plan for the upper end of that range. Your hospital also needs a treatment area, a recovery pen, and a separate isolation pen. **Should the sick pen have a concrete floor?** The treatment area should have a concrete floor because it is easier to clean and disinfect. The recovery pen can have a compacted limestone or gravel base that drains well. Concrete for the entire hospital is expensive and can be hard on cattle that need to lie down. A good compromise is concrete in the treatment area and a well drained aggregate base in the recovery pen. **How far should the isolation pen be from the main lot?** Aim for at least 50 to 100 feet of separation. The isolation pen should have its own drainage and its own equipment. The goal is to prevent any contact between isolation cattle and the rest of the herd, including indirect contact through runoff or shared tools. **How often should I check the sick pen?** At least twice daily during high risk periods. A morning and evening check are the minimum. During peak respiratory disease season, add a midday check. The person doing the checks should walk through the pen, look at every animal, and pull any animal that meets your treatment criteria. **What is the difference between a hospital pen and an isolation pen?** The hospital pen is for routine sick cattle that need treatment and observation. The isolation pen is for cattle with suspected contagious disease or cattle that are not responding to treatment. The isolation pen needs to be physically separate with its own drainage and equipment to prevent disease spread. **How do I decide when to euthanize a chronic animal?** Follow a written protocol developed with your veterinarian. The general criteria are an animal that cannot stand, an animal that is not eating or drinking, an animal with severe injury or disease that has a poor prognosis, and an animal that has not improved after a reasonable treatment period. If you are unsure, call your veterinarian. **What records should I keep for the sick pen?** Record every treatment with the animal ID, date, drug, dose, route, and response. Record every death and every euthanasia. Track the number of animals treated, the number retreated, and the number that die. Review these records monthly to spot trends and adjust your protocols. **Can I use the same equipment in the sick pen and the main pens?** You should avoid it. Shared equipment spreads disease. If you must share equipment, clean and disinfect it between uses. The ideal setup is dedicated tools, a dedicated tractor bucket, and dedicated boots for the hospital area. ## Related Farming Guides This section will be populated with links to related farming guides on cattle health, feedlot management, and facility design. Check back for updated resources. ## Related Clinical & Scientific Guides * [Cattle Head Gate Selection and Adjustment](/knowledge/animal-farming/beef-cattle/cattle-head-gate-selection-and-adjustment) * [Beef Cattle Handling Facility Flow](/knowledge/animal-farming/beef-cattle/beef-cattle-handling-facility-flow) * [Beef Cattle Maternity Pen Design: Comfort and Monitoring](/knowledge/animal-farming/beef-cattle/beef-cattle-maternity-pen-design-comfort-monitoring) ## References - Beef Cattle Research Council: https://www.beefresearch.ca/ - USDA APHIS Cattle Health: https://www.aphis.usda.gov/livestock-poultry-disease/cattle - WOAH Terrestrial Animal Health Code: https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/ - 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.