# Sheep Lambing Pens: Sizing, Layout, and Management ## Key Takeaways - Individual lambing pens (jugs) should be a minimum of 4x4 feet for small breeds and 4x5 feet or 5x5 feet for larger commercial breeds to allow comfortable lying and turning, preventing accidental crushing of lambs. - Plan for one jug per 10-15 ewes in a compact system, or one per 20-30 ewes if ewes and lambs are moved out quickly after bonding, to ensure pen availability. - Ventilation is critical; a dry, draft-free pen at 40-50°F is healthier than a warm, humid environment, preventing respiratory issues and chilling in newborns. - Deep, clean bedding, replaced between occupants, is essential for reducing the bacterial and parasitic load that causes scours and other neonatal diseases. - Accurate recordkeeping of lambing ease, birth weights, and mothering ability is crucial for guiding culling decisions and improving overall flock performance. - Seek veterinary assistance for ewes straining for over 30-60 minutes without lambing, signs of pregnancy toxemia, or multiple weak lambs failing to nurse. --- Lambing season is the most critical time on many sheep operations. The difference between a smooth lambing period and a chaotic one often comes down to the pens you have ready before the first ewe starts to bag up. This guide covers lambing pen design, sheep lambing pen size requirements, lambing pen layout options, temporary lambing pens, and lambing pen management practices. It is written for sheep producers who want practical, field-tested information they can apply to their own facilities, whether they run 20 ewes or 2,000. ## At a Glance - **Individual lambing pens (jugs) should be at least 4 feet by 4 feet for small breeds and 5 feet by 5 feet for larger breeds.** A 4 by 5 foot pen works well for most commercial ewes. - **Plan for one jug per 10 to 15 ewes** in a compact lambing system, or one jug per 20 to 30 ewes if you can move ewes out quickly after bonding. - **Temporary lambing pens made from panels or gates are a practical option** for producers who lamb on pasture or in buildings that serve other purposes during the rest of the year. - **Ventilation matters more than heat.** A dry, draft-free pen at 40 to 50 degrees Fahrenheit is healthier than a stuffy, humid shed at 70 degrees. - **Bedding should be deep, clean, and replaced between occupants** to reduce the load of bacteria and parasites that cause scours and other newborn diseases. - **Keep accurate records of lambing ease, birth weights, and mothering ability.** These records guide culling decisions and improve flock performance over time. - **Call a veterinarian or extension agent when a ewe has been straining for more than 30 to 60 minutes without producing a lamb**, when you see signs of pregnancy toxemia, or when you have multiple weak lambs that fail to nurse. ## Why Lambing Pen Design Matters Lambing pen design is not just about convenience. It directly affects lamb survival, ewe health, and the amount of labor you will need during the busiest weeks of your year. A well-designed lambing area reduces the risk of mis-mothering, allows you to observe ewes closely, and gives weak lambs a chance to warm up and nurse. A poorly designed setup creates stress for you and your animals, and that stress translates into losses. The main goals of any lambing pen system are simple. You want to give each ewe a clean, dry, draft-free space to give birth. You want to keep newborn lambs safe from being stepped on or laid on by other ewes. You want to make it easy for the ewe and lambs to bond in the first few hours after birth. You want to monitor ewes for problems without disturbing them. And you want to move ewes and lambs out efficiently once they are ready, so the pens are available for the next ewe. Every farm is different. A producer lambing 50 ewes in a converted barn has different needs than a producer lambing 500 ewes in a custom-built shed. The principles are the same, but the scale and materials will vary. This guide gives you the numbers and the reasoning so you can adapt the system to your own buildings, budget, and labor supply. ## Understanding the Stages of Lambing Before you design your pens, you need to understand how the lambing process unfolds. This knowledge drives every decision about pen size, layout, and management. The first stage of labor lasts 2 to 6 hours in most ewes. The cervix dilates and the ewe may appear restless, paw the ground, lie down and get up repeatedly, and isolate herself from the flock. She may also produce a small amount of mucus. Some ewes, especially first-timers, will not show obvious signs until they are close to delivering. The second stage is active delivery. The ewe strains visibly and the water bag appears, followed by the lamb. This stage usually lasts 30 to 60 minutes. A ewe that has been straining hard for more than 60 minutes without producing a lamb needs assistance. After the first lamb is born, the second lamb usually arrives within 15 to 45 minutes. If more than 60 minutes pass after the first lamb and you can feel another lamb still inside, you may need to intervene. The third stage is the delivery of the placenta, usually within 2 to 3 hours after the last lamb is born. The ewe should clean her lambs, and the lambs should stand and nurse within 1 to 2 hours of birth. These stages matter for pen design because they tell you how long a ewe will occupy a jug. A ewe that lambed easily and has one strong lamb might be ready to move to a larger mothering pen in 12 to 24 hours. A ewe with twins born in difficult presentation, or a ewe that is slow to bond, might need 48 to 72 hours in the jug. Your pen numbers need to account for the average stay, not the ideal stay. ## Sheep Lambing Pen Size: Getting the Numbers Right The size of your individual lambing pens, often called jugs, is one of the most important decisions you will make. Too small and the ewe cannot lie down comfortably or turn around, which can interfere with delivery and increase the risk of her lying on a lamb. Too large and the ewe may pace, which can also be dangerous for newborns, and you waste space and materials. ### Minimum Dimensions for Jugs The standard recommendation for a lambing jug is 4 feet by 4 feet for small breeds like Shetlands or Southdowns. For medium and large breeds like Suffolks, Hampshire, Dorset, or crossbred commercial ewes, use 4 feet by 5 feet or 5 feet by 5 feet. A 4 by 5 foot pen gives a large ewe room to lie down flat and turn around without being so large that she can build up a running start before she lies down. If you are building permanent pens, 4 by 5 feet is a good all-around size. If you are using panels to create temporary lambing pens, plan for the same footprint. A 16-foot panel can be configured as two 4 by 5 foot pens if you add a divider, or as one larger pen for a ewe with triplets. ### Height and Construction The sides of a lambing jug need to be at least 3 feet high for most breeds. Some large ewes can clear a lower panel, especially if they are nervous or if a lamb is crying on the other side. Use 3.5 to 4 foot panels if you have excitable breeds or if your ewes are not used to close confinement. The bottom of the pen should be solid to about 18 inches. This prevents lambs from crawling under the panels into the next pen. It also reduces drafts at floor level, where newborn lambs are most vulnerable. Many producers use plywood, sheet metal, or solid gates for the lower portion of the pen and panel or wire above. ### Door Options Each jug needs a door that opens easily and securely. A simple hook-and-eye latch works well. Some producers use a drop-down door that can be opened without entering the pen. Others prefer a door that swings outward into the aisle. Whatever you choose, make sure it is easy to operate with one hand while you are holding a lamb or a bucket. ### Flooring and Drainage The floor of your lambing area needs to be dry and easy to clean. Concrete is the most common choice for permanent facilities because it is durable, easy to disinfect, and does not absorb moisture. Dirt floors are acceptable for temporary lambing pens, but you should add a thick layer of bedding and be prepared to remove and replace the top layer between uses. Drainage is critical. The floor should slope slightly away from the center of the pen toward a drain or a low spot where urine can run off. Standing water in a lambing pen is a recipe for chilled lambs and foot problems in ewes. If you are setting up temporary lambing pens on a concrete floor, make sure the floor is swept and disinfected before you put down bedding. ## Lambing Pen Layout: Designing the Flow The layout of your lambing area affects how efficiently you can work and how calm your ewes remain. A good layout creates a logical flow from the main flock to the lambing pens and then to the mothering pens. ### The Classic Three-Area Layout Most well-designed lambing facilities have three distinct areas. The first is the pre-lambing or drop area, where ewes close to lambing are held under observation. The second is the jug area, where individual ewes give birth and bond with their lambs. The third is the mothering or mixing area, where ewes and lambs are grouped after they leave the jugs. The pre-lambing area should be adjacent to the jugs. This lets you watch for signs of labor and move a ewe into a jug quickly when she starts to deliver. Some producers use a separate shedding area or a catch pen for this purpose. Others simply watch the main flock and move ewes as they show signs. The jug area should be arranged so you can walk behind the pens to check on ewes without entering them. A 3 to 4 foot aisle behind the jugs gives you access for feeding, watering, and observation. The fronts of the pens face the main working aisle, so you can move ewes in and out easily. The mothering area should be large enough to hold several ewes with their lambs. Plan for at least 20 to 30 square feet per ewe with lambs in this area. This gives the lambs room to run and play while the ewes get reacquainted with each other. A mothering pen that is too crowded increases the risk of mis-mothering and lambs being injured. ### Aisle Width The main working aisle in front of the jugs should be at least 4 feet wide, and 5 to 6 feet is better. You will need to move ewes, carry feed and water, and sometimes bring in a veterinarian or a lambing cart. A narrow aisle makes every task harder and more stressful for the animals. ### Lighting Good lighting is essential in a lambing barn. You need to see what you are doing, especially if you lamb at night. Install enough lights to illuminate the entire working area. Use shatterproof bulbs or fixtures that are protected from damage by ewes or equipment. Consider installing a dimmer switch or using low-wattage night lights so you can check on ewes without waking them or disturbing the flock. ### Temperature and Ventilation Newborn lambs need to be warm, but the building does not need to be hot. The ideal temperature for a lambing barn is 40 to 50 degrees Fahrenheit. At this temperature, ewes are comfortable and lambs can dry off quickly if the pen is dry and draft-free. Ventilation is more important than heat. A barn that is tightly sealed to keep heat in will accumulate moisture, ammonia, and pathogens. This leads to pneumonia and other respiratory problems in lambs and ewes. Provide ridge vents, side vents, or open doors to allow fresh air to move through the building. The key is to provide ventilation without creating drafts at lamb level. A draft at floor level can chill a newborn lamb even when the air temperature is moderate. ### The Drop Pen A drop pen is a small pen where a ewe can lamb if you are not sure she needs a full jug or if you want to keep her separate from the flock for observation. A drop pen is typically 6 by 6 feet or 6 by 8 feet. It gives the ewe more room to move than a jug but still keeps her separate from the flock. Some producers use drop pens for first-time mothers that need extra observation but do not need the close confinement of a jug. ## Temporary Lambing Pens: Options and Setup Not every producer has a dedicated lambing barn. Temporary lambing pens are a practical solution for producers who lamb on pasture, who use a building that serves other purposes during the year, or who need extra capacity during a busy lambing season. ### Panel Systems The most common type of temporary lambing pen uses portable panels. These panels are typically 4 to 8 feet long and 3 to 4 feet high. They are made of metal tubing, wood, or heavy plastic. They connect to each other with pins or hooks and can be arranged in almost any configuration. For lambing jugs, use panels that are at least 3 feet high and have a solid lower section or add a solid kickboard along the bottom. A 16-foot panel can be folded to create two 4 by 5 foot pens by adding a divider panel. You can also create a row of pens along a wall by attaching panels to the wall at one end and to each other at the other end. ### Hay Bale Pens For producers who lamb on pasture or in a barn with limited equipment, hay bales can make effective temporary lambing pens. Arrange square bales to create pens of the right size. Use at least two bales stacked for the sides if you have large ewes that might jump. The disadvantage of hay bale pens is that they are bulky, hard to clean, and can harbor parasites if left in place too long. They also take time to set up and tear down. ### Portable Folding Pens Several manufacturers make folding lambing pens that are designed specifically for this purpose. These pens are typically 4 by 4 or 4 by 5 feet and fold flat for storage. They have solid sides, a door, and often a built-in feed pan holder. They are more expensive than panel systems but are quicker to set up and provide a more secure enclosure. ### Setting Up Temporary Pens When you set up temporary lambing pens, start with a clean, dry surface. Sweep and disinfect the floor if you are in a building. Lay down a thick layer of bedding before you set up the pens, or add bedding after the pens are in place. Position the pens so you have access to each one. Leave an aisle in front of the pens for moving ewes. If you are setting up pens in a barn that is also used for storage, make sure the pens are away from equipment and supplies that could fall or create hazards. ### Tear-Down and Storage Temporary lambing pens should be cleaned and disinfected before they are stored. Panels should be washed down, disinfected, and dried before stacking. Folding pens should be cleaned and stored in a dry place to prevent rust. Hay bale pens should be removed and composted or used for bedding after lambing is complete. ## Building Permanent Lambing Pens If you have the budget and the space, permanent lambing pens are a good investment. They are more durable, easier to clean, and faster to set up than temporary systems. They also add value to your property if you ever sell. ### Materials for Permanent Pens The most common materials for permanent jugs are wood and metal. Wood is cheaper and easier to work with, but it absorbs moisture and bacteria and needs to be replaced more often. Metal is more expensive but is easier to clean and disinfect. For the lower solid section, use plywood, oriented strand board (OSB), or sheet metal. If you use plywood or OSB, seal it with a waterproof paint or sealant to extend its life. For the upper section, use welded wire mesh, metal panels, or vertical bars. The opening size in the upper section should be small enough that lambs cannot get their heads stuck. ### Concrete or Slatted Floors A concrete floor is the best choice for permanent lambing pens. It is easy to clean, does not absorb moisture, and can be disinfected between uses. Make sure the concrete is finished smooth enough to clean easily but rough enough to provide good footing. A troweled finish with a slight broom texture works well. Slatted floors are another option, but they are less common for lambing pens. Slats allow manure and urine to fall through, which keeps the pen cleaner, but they can be hard on lambs' legs and are more expensive to install. If you use slats, make sure the gaps are narrow enough that lambs cannot catch their feet. ### Drainage and Cleaning Plan for drainage when you build permanent pens. The floor should slope slightly to a drain or to the back of the pen where you can scrape waste out. Some producers install a flush system that uses water to wash waste down a drain. This is efficient but requires a good water supply and a place to dispose of the waste. ### Heat Lamps and Supplemental Heat Many producers use heat lamps in lambing pens during cold weather. A heat lamp can be a lifesaver for a weak lamb or a lamb born on a cold night. However, heat lamps are a fire hazard if they are not installed correctly. Hang them securely out of reach of the ewe and use a bulb guard. Keep them at least 18 inches from bedding and flammable materials. Never leave a heat lamp on when you are not in the barn, and check them regularly for frayed cords or loose connections. An alternative to heat lamps is a lamb warming box. This is a small enclosed box with a heat source where you can dry and warm a chilled lamb before returning it to its mother. A warming box is safer than a heat lamp and is more effective at raising a lamb's core temperature. ## Lambing Pen Management: Day-to-Day Operations Having the right pens is only half the battle. How you manage them during lambing season determines your success. Good management starts before the first ewe lambs and continues until the last pair leaves the jugs. ### Preparing Pens Before Lambing Clean and disinfect all pens at least two weeks before lambing starts. Scrape out old bedding, wash down walls and floors with a disinfectant, and let everything dry thoroughly. Apply fresh bedding at least a few days before you expect the first lamb. This gives the bedding time to settle and reduces dust. Have all your supplies ready before lambing starts. You will need iodine or another navel dip, a lamb puller or obstetric chains, lubricant, towels, a heat source, colostrum or colostrum replacer, milk replacer, bottles and nipples, and a scale for weighing lambs. Keep these supplies in a clean, dry place near the lambing pens. ### Bedding Management Bedding is your first line of defense against disease. Newborn lambs are vulnerable to infection through the navel and through the respiratory tract. A clean, dry bed reduces the load of bacteria and parasites they are exposed to in the first hours of life. Use a generous layer of straw or wood shavings in each jug. The bedding should be deep enough that the ewe can make a comfortable nest and the lambs can stay dry. Add fresh bedding on top as needed during the ewe's stay. When the ewe and lambs leave the jug, remove all bedding, disinfect the pen, and put down fresh bedding before the next ewe arrives. Some producers use a "clean jug" policy where every ewe gets a freshly bedded, disinfected pen. This is the gold standard for disease control, but it requires enough pens to allow for cleaning time between occupants. If you do not have enough pens for this, at least remove the soiled top layer and add fresh bedding between occupants. ### Moving Ewes into Pens Move a ewe into a jug when she shows signs of active labor or when you need to keep her under close observation. Signs that a ewe is close to lambing include: - Restlessness and isolation from the flock - Pawing at the ground or bedding - Frequent lying down and getting up - A visible water bag or mucus discharge - Straining or contractions - A full udder with waxing at the teats Do not move a ewe into a jug too early. If you put her in days before she lambs, she will be stressed and may not settle. If you wait until she is actively straining, you may not have time to get her into the pen before the lamb arrives. Learn to read your ewes and time the move correctly. When you move a ewe, do it calmly and quietly. Do not chase her or grab her by the wool. Guide her into the pen with a gate or a sorting panel. Once she is in the jug, give her a few minutes to settle before you handle her. ### Monitoring Ewes in Pens Check ewes in jugs frequently, especially during the birth process. A ewe that is in active labor needs to be checked every 15 to 30 minutes. Look for progress. The water bag should appear, then the lamb should be delivered. If a ewe has been straining for more than 30 to 60 minutes without producing a lamb, she needs help. After the lamb is born, watch to make sure the ewe cleans it and that the lamb starts to breathe and move. A healthy lamb should be shaking its head and trying to sit up within a few minutes. It should stand within 30 to 60 minutes and nurse within 1 to 2 hours. Check for a second lamb. Many ewes have twins, and some have triplets. If the ewe is still straining or seems uncomfortable after delivering one lamb, check for another. Also watch for the placenta. It should be passed within 2 to 3 hours after the last lamb. ### Navel Care Treat the navel with iodine or another approved navel dip as soon as possible after birth. This helps prevent navel ill and joint ill, which are caused by bacteria entering through the unhealed navel. Dip the navel thoroughly, making sure the solution covers the entire cord. Repeat the treatment once or twice more during the first 12 to 24 hours if needed. ### Colostrum Management Lambs need colostrum within the first 2 hours of life, and ideally within the first 30 minutes. Colostrum provides antibodies that protect the lamb against disease. It also provides energy and helps the lamb pass the first feces, called meconium. Make sure each lamb nurses within 1 to 2 hours of birth. If a lamb is weak or the ewe has a large udder that is hard for the lamb to reach, help the lamb nurse. If the ewe has no colostrum or the lamb will not nurse, give the lamb colostrum by bottle or stomach tube. Use colostrum from your own flock if possible, or use a commercial colostrum replacer. Never use colostrum from a cow or another species. ### Records and Identification Keep accurate records for each ewe and lamb. Record the ewe's tag number, the date and time of lambing, the number of lambs, the birth weight of each lamb, the ease of lambing, and any problems that occurred. This information is valuable for culling decisions and for identifying ewes that need extra help in future years. Identify lambs soon after birth. Use ear tags, paint marks, or another system that works for your operation. Record the lamb's identification with its birth weight and any other relevant information. This is especially important if you are keeping breeding stock. ### Moving Ewes and Lambs Out A ewe and her lambs can leave the jug when the lambs are nursing well and the ewe is calm and attentive. This is usually 12 to 48 hours after birth. Some producers move ewes out as soon as 12 hours if the lambs are strong and nursing. Others keep ewes in jugs for 48 to 72 hours to ensure bonding and to give weak lambs extra time. When you move a ewe and lambs, move them to a mothering pen or a small group pen, not directly into the main flock. This gives the ewe and lambs time to adjust to being with other sheep. It also reduces the risk of mis-mothering, where a ewe loses track of her own lambs and another ewe tries to claim them. Group ewes with lambs of similar age. This makes it easier to manage and reduces the risk of lambs being injured by older, larger lambs. Some producers group ewes with singles separately from ewes with twins, so the single lambs do not get pushed around. ## Common Mistakes in Lambing Pen Design and Management Even experienced producers make mistakes with lambing pens. Here are some of the most common problems and how to avoid them. ### Pens That Are Too Large or Too Small A pen that is too large allows the ewe to pace and may increase the risk of her lying on a lamb. A pen that is too small is uncomfortable for the ewe and may interfere with delivery. Follow the size guidelines in this article and adjust based on your breed and the size of your ewes. ### Poor Ventilation A stuffy, humid lambing barn is one of the most common causes of disease problems. Newborn lambs are susceptible to pneumonia, and high humidity and ammonia levels make it worse. Provide ventilation even in cold weather. The goal is to remove moisture and gases while keeping drafts off the lambs. ### Inadequate Bedding Thin or wet bedding is a major contributor to chilled lambs and disease. Use a deep layer of clean, dry bedding and add more as needed. Remove soiled bedding between occupants and disinfect the pen. ### Not Enough Pens Running out of jugs in the middle of lambing season is a stressful situation. You are forced to move ewes out before they are ready or to leave ewes in the main flock where they may lamb in a corner or be disturbed by other sheep. Plan for enough pens based on your lambing season and the average stay of a ewe in a jug. ### Waiting Too Long to Intervene Some producers are reluctant to help a ewe that is struggling to lamb. They worry about causing injury or they are not sure what to do. The result is often a dead lamb or a ewe that is exhausted and unable to care for her lambs. Learn to recognize the signs of a difficult birth and call for help when you need it. ### Poor Biosecurity Lambing pens are a hotspot for disease transmission. If you do not clean and disinfect between occupants, you are spreading pathogens from one ewe to the next. This leads to outbreaks of scours, pneumonia, and other diseases. Follow a strict cleaning protocol and consider using separate equipment for each pen or disinfecting equipment between uses. ## Decision Thresholds: When to Intervene Knowing when to intervene in a lambing is one of the most important skills a shepherd can develop. The general rule is to interfere as little as possible but as much as necessary. Here are some specific thresholds to guide your decisions. ### When to Assist a Ewe Call a veterinarian or an experienced shepherd if: - The ewe has been straining hard for more than 30 to 60 minutes without producing a lamb. - The water bag has been visible for more than 30 minutes without a lamb appearing. - You can see a lamb's nose and feet but the ewe is not making progress. - You see only one foot or only a head, which indicates a malpresentation. - The ewe is in active labor and has not produced a lamb after 60 minutes. - There is a green or dark discharge, which may indicate the placenta is separating. - The ewe appears weak, depressed, or is showing signs of toxemia. ### When to Assist a Lamb A lamb needs help if: - It has not stood within 30 to 60 minutes of birth. - It has not nursed within 1 to 2 hours of birth. - It is weak, shivering, or has a low body temperature. - It is not breathing or is breathing with difficulty. - Its navel is bleeding heavily. - It has a visible deformity or injury. ### When to Call a Veterinarian Call a veterinarian or extension agent when: - You suspect a difficult birth that you cannot resolve with basic assistance. - The ewe has a prolapsed uterus or cervix. - The ewe shows signs of pregnancy toxemia, including dullness, weakness, and a sweet or fruity smell on her breath. - The ewe has a high fever or signs of infection. - You have multiple weak lambs or a high rate of stillbirths in your flock. - You are unsure how to handle a situation and need professional guidance. ## Monitoring and Recordkeeping Good recordkeeping is essential for improving your lambing operation over time. The data you collect this year will help you make better decisions next year. ### What to Record For each ewe, record: - Ewe identification number - Breed and age - Date and time of lambing - Number of lambs born (single, twin, triplet) - Number of lambs alive at 24 hours and at weaning - Lambing difficulty score (1 = unassisted, 2 = easy pull, 3 = hard pull, 4 = cesarean or surgery) - Birth weights of each lamb - Any health problems or interventions For each lamb, record: - Identification number - Birth weight - Sex - Sire (if known) - Any health problems or treatments - Weaning weight (if you are tracking growth) ### Using Records for Culling Decisions Records help you identify ewes that are not performing well. A ewe that consistently has difficult births, produces weak lambs, or is a poor mother should be culled. A ewe that produces strong, vigorous lambs and mothers them well is a keeper. Use your records to make these decisions objectively rather than relying on memory or emotion. ### Tracking Disease and Mortality Keep track of any disease problems in your lambing pens. If you see a cluster of scours cases or a run of pneumonia, investigate the cause. It may be a management issue, such as inadequate bedding or poor ventilation, or it may be a specific pathogen that requires veterinary attention. Early detection and response can prevent a small problem from becoming a large one. ## Special Considerations for Different Lambing Systems The size and layout of your lambing pens depend on your overall lambing system. Here are some considerations for different approaches. ### Indoor Lambing Indoor lambing gives you the most control over the environment and the most opportunity for close observation. It is the best choice for producers who want to monitor every ewe closely and intervene quickly when problems arise. The downside is the cost of facilities and the labor required for cleaning and bedding. For indoor lambing, plan for a dedicated lambing area with enough jugs for your flock size. A good rule of thumb is one jug per 10 to 15 ewes if you are lambing over a compact period, or one jug per 20 to 30 ewes if you are lambing over a longer period and can move ewes out quickly. ### Pasture Lambing Pasture lambing is less labor-intensive and allows ewes to lamb in a more natural environment. However, you have less control over the weather and less ability to monitor ewes closely. Pasture lambing works best in mild climates with good grass and shelter. For pasture lambing, you still need some pens for ewes that need assistance or observation. Set up a few temporary lambing pens in a sheltered area near the pasture. Use panels or portable folding pens that can be moved as needed. Have a plan for bringing ewes into a barn or shed if the weather turns bad. ### Accelerated Lambing Producers who lamb more than once per year need to manage their lambing pens carefully to maximize use. With accelerated lambing, you may have ewes lambing in different groups throughout the year. This requires a flexible pen system that can be set up and taken down quickly, or a permanent system that can be used year-round. Plan for a shorter stay in the jug with accelerated lambing, since you need to cycle ewes through quickly. This means you need to be more aggressive about moving ewes and lambs out once they are bonded and nursing well. ## When to Call a Veterinarian or Extension Agent Knowing when to call for professional help can save the life of a ewe or a lamb. Do not hesitate to call if you are unsure about a situation. It is better to make a call that turns out to be unnecessary than to wait until it is too late. Call a veterinarian or extension agent when: - You suspect a difficult birth that you cannot resolve with basic assistance. - The ewe has been straining for more than 60 minutes without producing a lamb. - You see a malpresentation that you cannot correct. - The ewe has a prolapsed uterus or cervix. - The ewe shows signs of pregnancy toxemia, which is a medical emergency. - The ewe has a high fever or signs of systemic infection. - You have multiple weak lambs or a high rate of stillbirths. - You need advice on disease prevention, vaccination, or parasite control. - You are unsure how to handle a specific situation and need professional guidance. When you call, be ready to provide specific information. Tell the veterinarian or extension agent your ewe's breed, age, and stage of pregnancy. Describe the ewe's condition, including her temperature, heart rate, and respiratory rate if you can measure them. Describe what you have done so far and how the ewe has responded. The more information you can provide, the better advice you will receive. ## Frequently Asked Questions ### How many lambing pens do I need for my flock? Plan for one individual lambing pen (jug) for every 10 to 15 ewes in a compact lambing system where most ewes lamb within a few weeks. If you lamb over a longer period or can move ewes out of jugs quickly, one jug per 20 to 30 ewes may be sufficient. The key variable is how long each ewe stays in a jug. If you average 24 to 48 hours per ewe, you can cycle more ewes through each pen than if you keep ewes in jugs for three days. ### What is the best size for a lambing pen? A 4 by 4 foot pen works for small breeds, but a 4 by 5 foot pen is a better all-around size for most commercial ewes. Large breeds may need a 5 by 5 foot pen. The pen should be large enough for the ewe to lie down flat and turn around, but small enough that she cannot build up momentum before lying down. This reduces the risk of her lying on a lamb. ### Can I use hay bales for lambing pens? Yes, hay bales can make effective temporary lambing pens, especially for pasture lambing. Use at least two bales stacked for the sides if you have large ewes. The main drawbacks are that hay bales are bulky, hard to clean, and can harbor parasites if left in place too long. They also take time to set up and tear down. ### How long should a ewe stay in a lambing jug? A ewe should stay in a jug until her lambs are nursing well and she is calm and attentive. This is usually 12 to 48 hours after birth. Some producers move ewes out at 12 hours if the lambs are strong, while others keep ewes in jugs for 48 to 72 hours. The longer stay gives weak lambs extra time to strengthen and ensures better bonding, but it ties up pens. ### How do I keep lambs warm in a lambing pen? The best way to keep lambs warm is to provide a clean, dry, draft-free pen with deep bedding. The building temperature should be 40 to 50 degrees Fahrenheit. If you need extra heat, use a heat lamp securely mounted out of reach of the ewe, or use a lamb warming box for chilled lambs. Never place a heat lamp directly over a ewe, and always use a bulb guard to prevent fires. ### What bedding should I use in lambing pens? Straw is the most common bedding for lambing pens. It is absorbent, provides good footing, and is relatively inexpensive. Wood shavings are also acceptable and are more absorbent than straw, but they can be dusty. Avoid using sawdust with fine particles, as it can be inhaled by lambs. Whatever bedding you use, keep it deep and dry, and change it between occupants. ### How do I disinfect lambing pens between ewes? Remove all bedding and scrape the floor clean. Wash the floor and walls with a disinfectant solution, following the label directions for dilution and contact time. Let the pen dry completely before adding fresh bedding. Common disinfectants include bleach solutions, quaternary ammonium compounds, and accelerated hydrogen peroxide products. Make sure the disinfectant you choose is effective against the pathogens you are concerned about. ### What should I do if a lamb is chilled? A chilled lamb needs to be warmed gradually. Move it to a warm, dry area and use a lamb warming box, a heat lamp, or warm water bottles wrapped in towels. Do not immerse the lamb in hot water, as this can cause shock. Once the lamb is warm and dry, help it nurse or give it colostrum by bottle or stomach tube. A chilled lamb that has not nursed needs colostrum as soon as possible. ## Related Farming Guides - [Sheep Lambing Pens: Design, Setup, and Management](/knowledge/animal-farming/sheep/sheep-lambing-pens-design-setup-management) This section will be populated with links to related farming guides on sheep management, lambing, and flock health. Check back for updated resources on sheep breeding, pasture management, parasite control, and other topics relevant to sheep producers. ## 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](/knowledge/veterinary-medicine/food-animal-medicine/small-ruminant-parasite-control-diagnostic-strategies-anthelmintic-stewardship) (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.