Nursery Pen Design for Weaned Pig Health

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-08-14

Key Takeaways

• Optimal Space and Flooring: Nursery pens require 0.30 to 0.40 m² per pig (up to 30 kg) to prevent overcrowding, reduce aggression, and promote uniform growth. Fully slatted plastic or woven wire flooring is recommended to maintain cleanliness, minimize ammonia exposure, and prevent foot injuries, with slat gaps of 8-10 mm.
• Critical Temperature and Ventilation Management: Maintaining a precise temperature gradient, starting at 28-30°C at placement and decreasing weekly, is crucial to prevent chilling, which predisposes pigs to scours and poor feed intake. Ventilation rates of 20 air changes/hour (warm) and 10 air changes/hour (cold) are essential for removing moisture, ammonia (<10 ppm), and pathogens while preserving heat.
• Strategic Grouping and Resource Access: Grouping pigs in sizes of 15-25 per pen balances social stability with efficient space utilization, minimizing aggression and stress. Ensuring adequate feeder space (4-6 cm/pig) and water access (1 nipple drinker/10 pigs with 0.5-1 L/min flow rate) is vital for preventing competition, dehydration, and supporting optimal feed intake.
• Biosecurity and Environmental Hygiene: Implementing an all-in, all-out system with a minimum 5-7 day downtime for thorough cleaning and disinfection between groups is paramount to break disease cycles. Maintaining relative humidity between 50-70% and ensuring uniform air movement prevents pathogen proliferation and respiratory irritation.
• Early Detection and Proactive Monitoring: Regular monitoring of pig behavior (huddling, panting, aggression) and key performance indicators (mortality, daily gain, feed conversion) alongside environmental parameters (temperature, ammonia) allows for early detection of issues. Prompt veterinary consultation is advised for mortality rates exceeding 5% or unresponsive disease outbreaks.

Weaning is one of the most stressful periods in a pig's life, and the nursery pen environment plays a decisive role in how well pigs transition from sow's milk to solid feed. This guide covers the key decisions in nursery pen design, including pen size, flooring, ventilation, temperature control, and grouping strategies. It is written for swine producers, farm managers, and agricultural students who want practical, evidence-based guidance on creating nursery housing that supports pig health, reduces mortality, and improves growth performance.

At a Glance

Why Nursery Pen Design Matters

The nursery phase typically covers the period from weaning at 3 to 4 weeks of age until pigs reach 20 to 30 kg, usually around 10 to 11 weeks of age. This is a critical window because pigs face three simultaneous challenges: separation from the sow, a sudden change in diet, and exposure to new pen mates and pathogens. The nursery pen is not just a holding space. It is the primary tool for managing these challenges.

Poor nursery pen design leads to measurable losses. Pigs that are cold, crowded, or on wet flooring eat less, gain less, and shed more pathogens. They also tend to have higher rates of diarrhea, respiratory disease, and tail biting. In contrast, well-designed nursery pens reduce the need for medical treatment, improve feed conversion, and set pigs up for better performance in the grow-finish phase.

The design decisions you make before pigs enter the nursery have a much larger effect on health than any treatment you can apply after problems appear. This article walks through each major design element, explains the reasoning behind the recommendations, and provides practical steps for implementation.

Understanding the Weaned Pig's Needs

Before designing the pen, it helps to understand what the weaned pig needs biologically. A piglet at weaning has a digestive system that is still adapting from milk to solid feed. The small intestine produces enzymes for digesting lactose and milk proteins but has limited capacity for digesting starches and plant proteins. This is why feed intake in the first week after weaning is often low, and why pigs are vulnerable to nutritional scours.

The immune system is also immature. Piglets receive antibodies through colostrum in the first 24 hours of life, but this passive immunity declines over the following weeks. The pig's own immune system is not fully functional until around 6 to 8 weeks of age. This creates a gap between about 3 and 6 weeks when pigs are especially susceptible to infection. Good nursery design reduces pathogen exposure during this vulnerable window.

Temperature regulation is another critical factor. A weaned pig has a high surface-to-volume ratio, meaning it loses body heat quickly. The lower critical temperature for a weaned pig is approximately 30°C (86°F) in the first days after weaning, assuming no drafts and dry flooring. If the temperature falls below this, the pig must burn energy to stay warm, energy that would otherwise go into growth. Chilled pigs also have reduced gut motility and immunity, making them more prone to scours.

Finally, pigs are social animals with a strong need for behavioral stability. Mixing pigs from different litters creates social stress as they establish a dominance hierarchy. This stress elevates cortisol levels, reduces feed intake, and increases susceptibility to disease. The design of the pen and the grouping strategy directly influence how quickly this hierarchy is established and how much damage it causes.

Nursery Pen Size and Space Allowance

Space allowance is the single most important design decision because it affects every other aspect of pig health and behavior. Pigs that are given too little space cannot move freely, have difficulty reaching feed and water, and experience higher levels of social stress. They also generate more heat and moisture per square meter, which complicates ventilation and temperature control.

The standard recommendation for nursery pigs is 0.30 to 0.40 square meters per pig for pigs up to 30 kg body weight. This translates to roughly 3 to 4 square feet per pig. The lower end of this range may work for pigs weaned at 3 weeks and moved to grow-finish at 20 kg, while the upper end suits operations that hold pigs in the nursery until 30 kg or more.

To calculate total pen area, multiply the expected number of pigs per pen by the space allowance. For example, a pen holding 20 pigs at 0.35 square meters per pig needs 7 square meters of floor space. It is always better to err on the side of more space. Overcrowding is one of the most common and most costly mistakes in nursery management.

The shape of the pen also matters. Long, narrow pens are generally better than square pens because they allow pigs to establish separate areas for sleeping, eating, and eliminating. A rectangle with a length-to-width ratio of about 2 to 1 works well. This allows pigs to maintain a dunging area at one end, away from the sleeping and feeding areas.

Pen height should be sufficient to prevent pigs from jumping or climbing out. A solid partition height of 70 to 90 cm is typical for nursery pens. Partitions should be solid enough to prevent nose-to-nose contact between adjacent pens, which reduces disease transmission, but should allow some visual contact to reduce stress from isolation.

Nursery Pen Flooring Options

Flooring is a major determinant of pig comfort, cleanliness, and foot health. The ideal nursery floor keeps pigs dry, provides good footing, is easy to clean, and does not cause abrasions or injuries. There are three main options: fully slatted, partially slatted, and solid with bedding.

Fully slatted floors are the most common choice for nursery pens in commercial production. The slats allow manure and urine to fall through into a pit below, keeping the pen surface clean and dry. Plastic slats are the preferred material for nursery pigs because they are warm, non-abrasive, and easy to clean. Woven wire is also used but can be harder on feet and more difficult to sanitize. Concrete slats are durable but can be too cold and abrasive for young pigs, so they are usually reserved for grow-finish facilities.

Slat width and gap spacing are important specifications. For nursery pigs, slats should be 8 to 10 mm wide with gaps of 8 to 10 mm. Gaps that are too wide allow feet to slip through and cause injuries. Gaps that are too narrow reduce manure passage and keep the floor dirty. The slats should run perpendicular to the direction pigs typically walk, which improves footing and reduces the risk of leg injuries.

Partially slatted floors combine a solid sleeping area with a slatted dunging area. This design can work well if managed carefully, because pigs naturally prefer to sleep on solid, dry surfaces and eliminate on slatted surfaces. However, the solid area must be kept clean and dry, which requires frequent scraping or the use of bedding. In a nursery setting, this can be labor-intensive and may not be practical for all operations.

Solid floors with bedding are used in some smaller or specialty operations. Straw or wood shavings provide warmth and comfort, and pigs can root and forage in the bedding, which supports natural behavior. However, bedding requires more labor, increases the risk of dust and respiratory irritation, and can harbor pathogens if not changed frequently. In a nursery setting, where hygiene is critical, solid floors with bedding are generally more difficult to manage than slatted floors.

Regardless of the flooring type, the condition of the floor surface is critical. Damaged or worn slats with sharp edges cause foot lesions, which are entry points for bacteria such as Streptococcus suis and Erysipelothrix rhusiopathiae. Inspect flooring between groups and repair or replace damaged sections before new pigs arrive.

Temperature Control and Heating

Temperature management is the most immediate and most consequential aspect of nursery pen design. Weaned pigs have poor thermal regulation and are highly sensitive to drafts and temperature fluctuations. A pig that is cold will huddle, shiver, eat less, and become more susceptible to scours and respiratory disease.

The target temperature at placement is 28 to 30°C (82 to 86°F). This should be measured at pig level, not at human height. After the first week, the temperature should be reduced gradually by 1 to 2°C per week, reaching approximately 24°C (75°F) by the fourth week. The goal is to keep pigs in their thermoneutral zone, where they do not have to expend energy to stay warm or cool down.

In practice, this means the nursery room must have supplemental heating, especially in the first two weeks after weaning. Options include radiant heaters, forced-air heaters, and heat lamps. Radiant heaters are often preferred because they warm the pigs directly without overheating the entire room. Heat lamps can be used to create a warm zone within each pen, allowing pigs to choose their preferred temperature.

Floor temperature is as important as air temperature. A weaned pig loses significant heat through contact with a cold floor. If the floor is concrete, it will conduct heat away from the pig rapidly. This is why raised plastic slats or insulated flooring are recommended for nursery pens. If solid flooring is used, a layer of bedding or a rubber mat can provide insulation.

Draft control is essential. Pigs at this age are extremely sensitive to drafts, which can cause effective temperatures to drop by several degrees even when the air temperature is correct. Check for drafts at pig level by holding a lit candle or smoke source near the floor and observing air movement. Seal any gaps around doors, windows, and wall joints. Air inlets should be positioned to direct incoming air upward and away from the pig zone.

Ventilation and Air Quality

Ventilation serves two purposes in the nursery: removing moisture, ammonia, and pathogens from the air, and providing fresh oxygen. Poor ventilation leads to high humidity, which makes pigs feel colder and promotes the growth of pathogens. It also allows ammonia and carbon dioxide to build up, which irritates the respiratory tract and increases susceptibility to pneumonia and other respiratory diseases.

The ventilation rate should be adjustable based on temperature and humidity. In warm weather, the minimum ventilation rate is approximately 20 air changes per hour. In cold weather, this drops to about 10 air changes per hour, enough to remove moisture and gases without chilling the pigs. The system should be capable of ramping up quickly in hot weather to prevent heat stress.

Ammonia levels should be kept below 10 parts per million (ppm) at pig level. You can measure ammonia with a simple gas detection tube or electronic monitor. If you can smell ammonia when entering the room, levels are likely above acceptable limits. High ammonia damages the cilia in the respiratory tract, the tiny hair-like structures that trap and remove pathogens. This damage makes pigs more vulnerable to respiratory infections.

Relative humidity should be maintained between 50 and 70 percent. High humidity makes pigs feel colder because moisture on the skin conducts heat away more rapidly. It also increases the survival of pathogens in the environment. Low humidity creates dust, which can carry pathogens and irritate the respiratory tract.

The ventilation system should create uniform air movement throughout the room. Dead zones, where air does not circulate, become pockets of high ammonia and high humidity. Regularly check air speed at pig level. A gentle air movement of 0.1 to 0.2 meters per second is desirable. Anything more creates a draft.

Feeders and Water Systems

Feed and water are the two resources that drive growth, and their placement and design within the pen have a major impact on how well pigs perform. Pigs that cannot access feed or water easily will fall behind, and competition at feeders can lead to aggression and injury.

Feeder space is calculated based on the number of pigs per pen and the type of feeder. For dry feeders, allow 4 to 6 cm of trough space per pig. This means a pen of 20 pigs needs a feeder with at least 80 to 120 cm of trough length. If pigs are fed in groups at set times, more space is needed than if feed is available continuously. For wet-dry feeders, which combine feed and water, allow one feeder opening per 8 to 10 pigs.

Feeder design should minimize feed wastage while allowing easy access. The feeder lip should be low enough that small pigs can reach it comfortably. Adjustable feeders can be raised as pigs grow, which reduces feed wastage and keeps feed clean. The feed should be fresh and free from mold. Check feeders daily and remove any stale or spoiled feed.

Water is critical in the nursery. Weaned pigs need ready access to clean, fresh water, especially in the first days after weaning when they may be reluctant to eat. Provide one nipple drinker per 10 pigs, or one cup drinker per 15 pigs. The flow rate should be 0.5 to 1 liter per minute. If the flow rate is too low, pigs cannot drink enough, which reduces feed intake and can lead to dehydration.

Waterer placement is important. Nipple drinkers should be installed at a height that allows pigs to drink comfortably without straining. For nursery pigs, the drinker should be at shoulder height of the smallest pig in the pen. This is approximately 30 to 40 cm from the floor. If the drinker is too high, small pigs cannot reach it. If it is too low, pigs may contaminate it with manure.

Monitor water intake closely in the first week after weaning. A sudden drop in water consumption is an early warning sign of disease or a problem with the water system. Check drinkers daily for blockages and leaks. A leaking drinker can wet the floor, which chills pigs and promotes pathogen growth.

Grouping and Social Structure

How you group pigs when they enter the nursery has a profound effect on their health and performance. Mixing unfamiliar pigs triggers aggression as they establish a dominance hierarchy. This aggression is stressful, and the stress response suppresses the immune system and reduces feed intake. The goal of grouping is to minimize this stress and help pigs settle quickly.

The ideal group size for nursery pigs is 15 to 25 pigs per pen. This is small enough that pigs can recognize each other and establish a stable hierarchy, but large enough to be efficient with space and labor. Very large groups, such as 50 or more pigs per pen, are associated with more aggression and more variation in growth.

When possible, keep pigs from the same litter together. Littermates have already established a social order and will not need to fight. If you must mix litters, the best time to do so is at weaning, when pigs are already stressed and the disruption is less noticeable than if you mix them later. Mixing pigs after they have settled in their new environment causes a second round of fighting and stress.

Sorting pigs by size can reduce competition and help smaller pigs get their share of feed and water. However, be cautious about removing the smallest pigs repeatedly. Each time you move a pig to a new group, it must re-establish its social position, which is stressful. Sort once at placement and then intervene only when a pig is clearly failing to thrive.

The physical environment can help reduce aggression. Pigs that have space to retreat and hide are less likely to fight. Providing a solid partition between pens, rather than bars, reduces visual contact and can calm pigs. Environmental enrichment, such as hanging chains or rubber toys, gives pigs something to root and chew on, which redirects aggressive behavior.

Lighting and the Daily Routine

Lighting is often overlooked in nursery design, but it affects both pig behavior and worker performance. Pigs are diurnal, meaning they are active during the day and rest at night. A consistent light-dark cycle helps establish normal feeding and resting patterns.

Provide 12 to 16 hours of light per day, with a period of darkness at night. This is not just about the pigs. A consistent lighting schedule also helps workers observe pigs during routine checks. Dimming lights during the night can reduce stress and allow pigs to rest, but you should have enough light to perform nighttime checks without fully illuminating the room.

The intensity of light should be sufficient for workers to inspect pigs and equipment. A minimum of 100 lux at pig level is recommended for routine inspection. This is roughly equivalent to the light in a well-lit room. Brighter light may be needed for tasks such as vaccination or treatment.

Lighting should be placed to avoid creating dark corners where pigs may hide or where problems may go unnoticed. Evenly distributed lighting helps workers spot sick or injured pigs quickly. It also makes the environment less stressful for pigs, as they are less likely to be startled by sudden shadows or movement.

Biosecurity and Cleaning Between Groups

The nursery is a high-risk environment for disease transmission because it houses young, immunologically naive pigs in close contact. Biosecurity starts with the design of the facility and continues with the cleaning and disinfection procedures between groups.

The all-in, all-out system is the foundation of nursery biosecurity. This means the entire room is filled with pigs of the same age at the same time, and the room is completely emptied before the next group arrives. This breaks the cycle of disease transmission that occurs when new pigs are introduced into a room with older, shedding pigs.

Between groups, the room must be thoroughly cleaned and disinfected. This process is known as a wash-down or downtime. The standard procedure is to remove all organic material, wash the room with detergent and high-pressure water, disinfect all surfaces, and allow the room to dry completely. The drying period is critical because many pathogens are sensitive to desiccation.

The recommended downtime between groups is a minimum of 5 to 7 days. This allows time for cleaning, disinfection, and drying. Longer downtime may be needed after disease outbreaks. During downtime, the room should be kept closed and free of pigs and other animals.

The cleaning process should include all surfaces, including walls, partitions, feeders, drinkers, and ventilation equipment. Pay special attention to areas that are difficult to clean, such as corners, cracks, and under feeders. These areas can harbor pathogens and re-infect the next group.

Manure handling is part of biosecurity. If the nursery uses a pit system, the pit should be drained and cleaned between groups. If manure is removed continuously, ensure that the removal system does not create aerosols that carry pathogens into the pig zone.

Common Mistakes in Nursery Pen Design

Several design and management errors recur across operations. Recognizing these mistakes is the first step to correcting them.

Overcrowding is the most common and most damaging error. Producers often push space allowance below recommended levels to maximize facility utilization. This saves on capital cost but costs far more in reduced growth, increased mortality, and higher medication costs. The relationship between space and performance is well established, and the penalty for overcrowding is consistent.

Inadequate temperature control is a close second. Weaning rooms that are too cold, or that have large temperature fluctuations, cause pigs to eat less and become sick. The cost of heating is real, but it is small compared to the cost of poor performance and death loss. Conversely, overheating causes pigs to lie in the dunging area and become dirty, which increases disease pressure.

Poor ventilation is another frequent problem. Rooms that are tightly sealed to conserve heat often have inadequate air exchange, leading to high humidity and ammonia. This creates a respiratory disease problem that is difficult to resolve without changing the ventilation system. The solution is to design ventilation that can operate independently of heating, so fresh air can be brought in without chilling the pigs.

Inconsistent grouping is a management error that undermines even a well-designed pen. Mixing pigs multiple times, or sorting repeatedly, causes chronic stress and poor performance. A stable group is one of the cheapest and most effective health interventions available.

Dirty waterers and feeders are common in busy operations. A drinker that is blocked or a feeder that is contaminated with manure can cause a pig to fall behind quickly. Daily checks of feed and water are non-negotiable in the nursery.

Monitoring and Recordkeeping

Regular monitoring is essential to catch problems early and to evaluate the effectiveness of your nursery design. The health of the group is a direct reflection of how well the environment is meeting pig needs.

Check pigs at least twice daily. Look for signs of disease, such as lethargy, diarrhea, coughing, or poor appetite. Also observe behavior. Pigs that are huddling are too cold. Pigs that are panting or lying spread out are too hot. Pigs that are fighting or biting tails may be overcrowded or under-stimulated.

Keep records of key performance indicators. The most important are mortality rate, average daily gain, feed conversion ratio, and medication cost. These numbers tell you whether your nursery is performing as expected. A mortality rate above 2 to 3 percent in the nursery phase warrants investigation. Average daily gain should be 300 to 500 grams per day, depending on age and genetics.

Track environmental parameters daily. Temperature, humidity, and ammonia levels should be recorded at a consistent time each day. This data helps you identify trends and correlate environmental changes with health outcomes. For example, if scours appear a few days after a drop in room temperature, you have identified a likely cause.

Water and feed intake should also be monitored. A sudden drop in either is often the first sign of disease. Track feed disappearance per pen and water meter readings if available. These numbers are sensitive indicators of group health.

Use a simple recordkeeping system that is easy to maintain. A whiteboard in the nursery office or a spreadsheet on a tablet works well. The goal is to have data you can review at the end of each group to identify what worked and what did not.

When to Call a Veterinarian or Extension Agent

Nursery pen design can prevent many health problems, but it cannot eliminate all of them. There will be times when you need professional help. Knowing when to call is important.

Call a veterinarian when you see a sudden increase in mortality, when pigs are not responding to treatment, or when you are unsure of the cause of a disease outbreak. A mortality rate above 5 percent in the nursery phase is a red flag that requires immediate investigation. Similarly, if pigs are not gaining weight despite adequate feed and a good environment, a veterinarian can help identify underlying causes.

Call an extension agent or swine specialist when you are planning a new facility or renovating an existing one. They can help you design a nursery that meets your specific needs and budget. They can also help you evaluate ventilation systems, flooring options, and other design elements.

Extension agents can also help with recordkeeping and benchmarking. They can compare your performance data to regional or national averages, helping you identify areas for improvement. They can also provide training for farm staff on topics such as biosecurity, pig handling, and disease recognition.

Do not wait until a problem becomes severe. Early intervention is always more effective and less costly than crisis management. If you are unsure whether to call, it is better to call and get advice than to wait and risk a larger problem.

Cost Considerations and Decision Thresholds

Nursery pen design involves upfront costs, and producers need to weigh these against long-term benefits. The cost of construction or renovation varies widely by region, materials, and existing infrastructure. However, the cost of poor design is also real and often larger than the savings from cutting corners.

The decision to invest in better flooring, heating, or ventilation should be based on the expected return. For example, if upgrading from concrete to plastic slats costs $5,000 per room and reduces mortality by 1 percent and improves daily gain by 5 percent, the payback period may be less than one year. Use your own performance data to make these calculations.

A useful decision threshold is the cost of a pig. If a nursery pig is worth $50 at market, and poor design causes a 2 percent mortality increase, that is $1 per pig lost. For a 500-pig nursery, that is $500 per group, or $2,500 per year if you run five groups. This simple calculation can justify meaningful investments in design improvements.

Another threshold is the cost of medication. If poor ventilation leads to a respiratory disease outbreak that requires treating the entire group, the medication cost alone may exceed the cost of the ventilation upgrade. Track your medication costs per pig and compare them to the cost of design improvements.

Labor is also a factor. A nursery that is poorly designed requires more labor to clean, feed, and monitor. If a better design saves 30 minutes per day of labor, that is worth approximately 180 hours per year, which has a real value. Include labor savings in your cost calculations.

Designing for the Future

Nursery pen design should not only meet today's needs but also anticipate future changes. Genetics, feed formulations, and disease pressures evolve over time. A flexible design can adapt to these changes without major renovation.

Consider building with adjustable partitions that can be moved to change pen size. This allows you to adjust group size as pigs grow or as your management strategy changes. It also lets you create isolation pens for sick pigs without losing usable space.

Choose materials that are durable and easy to repair. Plastic slats and galvanized steel partitions have long service lives but can be damaged by rough handling. Keep spare parts on hand so repairs can be made quickly.

Design for future automation. Many operations are adopting automated feeding systems, environmental controls, and data collection. Pens should be designed to accommodate these systems without major modification. For example, leave space for feeder sensors or environmental probes.

Finally, design with the worker in mind. A nursery that is easy to work in is more likely to be well managed. Good lighting, clear aisles, and convenient access to feed and water systems reduce labor and improve the quality of care.

Frequently Asked Questions

What is the ideal weaning age for nursery pen design?

The ideal weaning age is 21 days or older. Pigs weaned at 21 days have more mature digestive and immune systems than those weaned earlier, which makes them better able to cope with the stress of weaning. Weaning before 21 days is associated with higher mortality, more scours, and slower growth in the nursery. If you are building a new nursery, design it for pigs weaned at 21 days or older, as this is the standard for most commercial operations.

How much space does a weaned pig need in the nursery?

A weaned pig needs 0.30 to 0.40 square meters of floor space per pig, depending on the weight at which pigs leave the nursery. Pigs that will leave at 20 kg can be housed at the lower end of this range, while pigs held to 30 kg need the higher end. Overcrowding reduces growth and increases disease risk, so it is better to provide more space rather than less.

What is the best flooring for nursery pigs?

Plastic slatted flooring is generally the best choice for nursery pigs. It is warm, non-abrasive, easy to clean, and allows manure to fall through. Woven wire is also acceptable but can be harder on feet. Concrete slats are durable but too cold and abrasive for young pigs. The slat width should be 8 to 10 mm with gaps of 8 to 10 mm.

How do I know if my nursery is too cold?

Signs of chilling include pigs huddling together, shivering, and lying close to each other in a pile. Pigs that are cold will also have reduced feed intake and may develop diarrhea. The room temperature should be 28 to 30°C at pig level during the first week after weaning. Use a thermometer at pig level, not at human height, to measure the actual temperature the pigs experience.

What should I do if my pigs are scouring after weaning?

First, check the environment. Is the temperature at the correct level? Is the floor dry? Is the ammonia level below 10 ppm? Many cases of post-weaning scours are triggered by environmental stress, especially chilling. If the environment is correct, the scours may be nutritional or infectious. Consult your veterinarian for a diagnosis and treatment plan. Do not let scours go untreated, as dehydration can kill pigs quickly.

How often should I clean the nursery between groups?

Clean and disinfect the nursery thoroughly between every group. Remove all pigs, wash all surfaces with detergent and high-pressure water, disinfect, and allow the room to dry completely. The recommended downtime is a minimum of 5 to 7 days. This breaks the disease cycle and gives the room time to dry, which kills many pathogens.

What is the best way to reduce aggression when mixing pigs?

Keep littermates together whenever possible. If you must mix litters, do it at weaning and do not mix again. Sort by size at placement, but avoid repeated sorting. Provide environmental enrichment, such as hanging chains or rubber toys, to redirect aggressive behavior. A solid partition between pens reduces visual contact and can calm pigs.

How do I measure ammonia levels in my nursery?

Use a gas detection tube or an electronic ammonia monitor. Place the sensor at pig level, as ammonia is heavier than air and concentrations are higher near the floor. Ammonia levels should be below 10 ppm. If you can smell ammonia when entering the room, levels are likely too high, and you need to increase ventilation or improve manure removal.

Related Farming Guides

This section will be populated with links to related farming guides on swine production, pig health management, and facility design. Check back for updated content or explore the site for more resources on raising healthy, productive pigs.

Related Clinical & Scientific Guides

• Pig Enrichment Programs and Behavior Monitoring
• Swine Handling Facility Design for Safe Pig Movement
• Swine Feeding Management for Grow-Finish Pigs

References

• National Pork Board: https://www.pork.org/
• USDA APHIS Swine Health: https://www.aphis.usda.gov/livestock-poultry-disease/swine
• FAO Pig Production: https://www.fao.org/pig-production-and-products/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.