Swine Breeding Supplies: Essential Equipment and Selection Criteria

Selecting the right breeding supplies for a swine operation directly affects conception rates, litter size, labor efficiency, and herd health. This article covers the essential equipment categories for swine breeding, including artificial insemination kits, heat detection aids, and farrowing equipment, with practical selection criteria based on herd size and management goals. The guidance applies to commercial farms, breeding herds, and educational settings where staff need clear equipment standards and protocols.

At a Glance: Breeding Supply Categories and Selection Priorities

The table below summarizes the main supply categories, their primary functions, and the key selection considerations for each. Use this as a starting point when planning equipment purchases or reviewing existing supplies.

Core Principles of Swine Breeding Supply Management

Matching Supplies to Reproductive Goals

The reproductive performance of a swine herd depends on the interaction between animal factors, management practices, and the equipment used. Artificial insemination has become the predominant method for commercial sow breeding, and the supplies you choose must support the specific insemination protocol you follow. Liquid semen extended for cervical or intrauterine insemination is the standard technology used by the pig industry, and your equipment must be compatible with the semen doses you purchase or produce. [7]

When selecting supplies, start by defining your reproductive targets. A herd focused on maximizing genetic improvement may prioritize low-dose insemination catheters and fixed-time insemination protocols. A herd focused on labor efficiency may invest in heat detection aids that reduce the time staff spend checking sows. A herd with biosecurity concerns may prioritize single-use supplies and disinfection stations. Your equipment choices should follow from your management goals, not the other way around.

Biosecurity as a Supply Selection Criterion

Disease introduction into swine breeding herds can occur through contacts involving people, animals, vehicles, or supplies. A study of 84 breeding sites found that all sites received at least three supply deliveries in a one-month period, with semen delivered to 99 percent of sites, small materials or drugs to 98 percent, bags to 87 percent, and equipment to 61 percent. [9] These deliveries represent a regular pathway for potential disease introduction, and your supply selection should account for this risk.

Biosecurity practices on pig farms are often inadequate in key areas. A survey of pig farms found that external biosecurity scored higher than internal biosecurity, with breeding pig and semen purchase scoring highest among external biosecurity subcategories while visitors and farmworkers scored lowest. [10] This pattern suggests that farms recognize the risk of incoming animals and semen but may overlook the risks associated with people and supplies moving through the farm. When selecting breeding supplies, consider how each item will be delivered, stored, and used in a way that minimizes disease introduction and spread.

Equipment Availability and Handling

A physical examination of swine should be performed with all necessary equipment available before starting the individual examination. [13] The same principle applies to breeding operations. If you are checking sows for estrus, you need the heat detection aids, records, and marking supplies ready before you enter the barn. If you are performing artificial insemination, you need the catheters, semen doses, and hygiene supplies prepared in advance. Missing equipment during a breeding task leads to incomplete work, repeated handling of animals, and increased stress for both pigs and staff.

Artificial Insemination Supplies

Semen Storage and Handling Equipment

Liquid semen extenders are designed to sustain sperm fertility for three to seven days. [16] This means your storage equipment must maintain the correct temperature range from the moment semen arrives until the moment of insemination. A semen storage refrigerator or cooler is an essential piece of equipment for any farm using artificial insemination. The unit should be dedicated to semen storage only, not shared with vaccines or other biological products that require different temperature conditions.

Temperature monitoring is a critical part of semen handling. A maximum-minimum thermometer in the semen storage unit allows staff to check whether temperatures have fluctuated outside the acceptable range. If a temperature excursion occurs, the affected semen doses should be flagged and their use discussed with your semen supplier or veterinarian. Do not use semen that has been exposed to temperature extremes without professional advice.

Semen transport containers are needed when moving semen from the storage unit to the breeding area. These containers should maintain temperature during transport and protect the semen from direct sunlight, cold drafts, and physical shock. The time between removing semen from storage and completing insemination should be minimized.

Insemination Catheters

Insemination catheters are the primary delivery device for semen. Traditional cervical catheters are designed to deposit semen in the cervix, while intrauterine catheters are designed to deposit semen deeper in the reproductive tract. The choice between these catheter types depends on the semen dose you are using and your herd's reproductive management approach.

Traditional AI doses contain 2.5 to 3.0 billion motile sperm in 75 to 100 mL of extender. Low-dose protocols use 1.5 to 2.0 billion sperm in similar or reduced volumes for cervical or intrauterine insemination. [16] If you are using low-dose protocols, you need catheters that can deliver the reduced volume effectively. Intrauterine catheters are designed for this purpose and require proper training to use correctly.

Catheter selection should also consider the physical characteristics of the sows being inseminated. Gilts and first-parity sows may require different catheter sizes than mature sows. Your semen supplier or veterinarian can advise on the appropriate catheter type for your herd. Single-use catheters reduce the risk of disease transmission between animals and are recommended for herds with biosecurity concerns.

Insemination Technique and Equipment

The success of artificial insemination depends on proper technique as much as on the equipment itself. Insemination duration, catheter insertion depth, and the standing reflex of the sow are all recorded as insemination characteristics in research settings. [17] These factors matter in commercial practice as well. Staff should be trained to recognize the standing reflex and to perform insemination in a calm, consistent manner.

Fixed-time artificial insemination is an approach that synchronizes ovulation and allows a single insemination at a predetermined time. The vaginal application of a gel containing the GnRH agonist triptorelin has been evaluated for this purpose. In one study, farrowing rate was comparable between triptorelin-treated sows and a control group following standard insemination strategy, but triptorelin treatment without estrus had a lower farrowing rate. [14] This finding highlights the importance of heat detection even when using ovulation synchronization products. The equipment for fixed-time insemination includes the synchronization product, the applicator, and the insemination catheters, along with accurate records of weaning dates and treatment timing.

Semen Quality Assessment

If you are producing semen on-farm, you need equipment for semen collection and quality assessment. This includes collection supplies, extenders, and a microscope for evaluating sperm motility and morphology. Semen quality criteria in research settings include at least 75 percent total motility and 75 percent normal morphology. [17] Your quality standards should be set in consultation with your veterinarian or reproduction specialist.

If you are purchasing semen from a boar stud, the stud is responsible for quality assessment, but you are responsible for proper handling and storage. Record the arrival date, batch number, and expected use-by date for each semen delivery. This information is essential for tracking fertility outcomes and identifying potential semen-related problems.

Heat Detection Aids

Boar Exposure and Detection Methods

Manual detection of estrus is the predominant method for commercial sow breeding. [16] This involves exposing sows to a mature boar and observing for the standing reflex, where the sow stands immobile when pressure is applied to her back. Heat detection aids support this process by making the signs of estrus more obvious or by reducing the labor required for detection.

Boar exposure can be direct, with the boar in the same pen or alley as the sows, or indirect, with the boar in an adjacent pen or behind a barrier. Direct exposure is more effective for stimulating estrus but requires more space and careful supervision. Indirect exposure is safer and easier to manage but may be less stimulating for some sows. Your facility design and staffing levels will influence which approach is practical.

Detection Aids and Their Limitations

Several types of heat detection aids are available. Back pressure testing is the standard method, where staff apply pressure to the sow's back and observe for the standing reflex. This method requires no special equipment but requires well-trained staff who can distinguish true standing estrus from other behaviors.

Other aids include boar scent sprays, which can be used when a boar is not available or practical, and electronic detection devices that measure changes in the reproductive tract. These aids can support but should not replace boar exposure and back pressure testing. The research on triptorelin treatment showed that sows treated without signs of estrus had a lower farrowing rate, [14] which reinforces the importance of accurate heat detection even when using synchronization products.

Records and Detection Scheduling

Heat detection should follow a consistent schedule, typically twice daily, with records kept for each sow. The records should include the date of weaning, the first day of detected estrus, the duration of estrus, and the dates of insemination. This information is essential for evaluating the effectiveness of your heat detection program and for making management decisions about individual sows.

A breeding performance management system can support this process by providing systematic analysis of reproduction parameters including farrowing rate, farrowing interval, average gestation days, and average weaned weight. [25] These systems can help identify sows that should be culled and can provide the data needed to evaluate the effectiveness of your breeding supplies and protocols.

Farrowing Equipment

Farrowing Crate Design and Function

Farrowing crates are designed to protect piglets from crushing by the sow while allowing the sow to stand, lie, and nurse. The crate should be adjustable to accommodate sows of different sizes and should allow the sow to lie down and rise without difficulty. The design should also allow staff to access the sow and piglets safely for routine care and intervention.

The farrowing area should be clean, dry, and free of drafts. Piglet heating zones are essential, as newborn piglets cannot regulate their body temperature effectively. Heat lamps or heated pads should be positioned to create a warm zone away from the sow's lying area, encouraging piglets to rest safely away from the sow.

Flooring and Sanitation

Flooring in the farrowing area must provide good traction for the sow while allowing manure and urine to pass through for easy cleaning. Fully slatted or partially slatted floors are common choices. The flooring material should be durable, easy to clean, and comfortable for both sows and piglets.

Sanitation supplies for the farrowing area include disinfectants, cleaning equipment, and protocols for between-batch cleaning. The farrowing area should be cleaned and disinfected between groups of sows to reduce the disease pressure on newborn piglets. Your cleaning protocols should be developed in consultation with your veterinarian and should account for the specific pathogens of concern in your area.

Piglet Processing Supplies

Piglet processing supplies include equipment for identification, iron injection, castration, and tail docking. These supplies should be organized and ready before farrowing begins. Needle-free injection technology has been evaluated for vaccine delivery in pigs, with comparable or superior immunogenicity for three of four vaccines tested compared to needle injection. [11] If you are considering needle-free injection equipment, discuss the options with your veterinarian to determine whether this technology is appropriate for your herd.

All piglet processing equipment should be cleaned and disinfected between litters to prevent disease transmission. Records of piglet processing should be maintained for each litter, including the date of processing, the procedures performed, and any abnormalities observed.

Semen and Breeding Supplies for Different Herd Sizes

Small Herds and Breeding Operations

Small herds, typically fewer than 100 sows, may have limited labor and facilities. For these operations, the priority is simplicity and reliability. A basic artificial insemination kit with cervical catheters, a semen storage unit, and basic heat detection supplies may be sufficient. The farm may rely on purchased semen instead of on-farm boar housing, which reduces the need for boar management supplies.

Small herds should still maintain accurate breeding records, even if the record system is paper-based instead of electronic. The records should include weaning dates, estrus detection results, insemination dates, and farrowing outcomes. These records are essential for identifying problems and for making culling decisions.

Medium Herds

Medium herds, typically 100 to 500 sows, may have dedicated breeding staff and more sophisticated facilities. These operations may benefit from intrauterine catheters for low-dose insemination, electronic record systems, and more advanced heat detection aids. The farm may also have a boar or two for heat detection and natural service backup.

Medium herds should have written protocols for all breeding procedures, including semen handling, insemination technique, and heat detection. Staff training should be documented, and refresher training should be provided regularly. The farm should also have a biosecurity plan that addresses supply deliveries and visitor protocols.

Large Commercial Herds

Large herds, typically more than 500 sows, require the most sophisticated equipment and management systems. These operations may use fixed-time insemination protocols, electronic sow feeding systems, and comprehensive record systems. The study of 84 breeding sites had a median sow inventory of 675, [9] which gives an indication of the scale of operations where these systems are common.

Large herds should have dedicated breeding areas with controlled access, semen storage and handling facilities, and clearly defined protocols for all procedures. Staff should have specialized roles, and training should be documented and regularly updated. The farm should also have contingency plans for equipment failure, such as backup semen storage or alternative insemination methods.

Records and Measurements for Breeding Supply Management

Essential Breeding Records

Accurate records are essential for evaluating the effectiveness of your breeding supplies and protocols. The following records should be maintained for each sow:

• Sow identification and parity
• Weaning date
• Estrus detection dates and results
• Insemination dates and catheter type used
• Semen batch number and supplier
• Farrowing date and litter size
• Number of piglets born alive, stillborn, and mummified
• Weaning weight and number weaned

These records allow you to calculate key performance indicators such as farrowing rate, litter size, and weaning-to-estrus interval. A breeding performance management system can support this analysis and can help identify sows that should be culled. [25]

Supply Inventory and Usage Records

In addition to animal records, you should maintain records of your breeding supply inventory and usage. This includes the quantity of catheters, semen doses, and other consumables on hand, the rate of usage, and the reorder points for each item. Supply records help prevent stockouts that can disrupt breeding schedules and help identify unusual usage patterns that may indicate problems.

Semen delivery records should include the arrival date, batch number, expected use-by date, and the number of doses received. This information is essential for tracking fertility outcomes and for identifying potential semen-related problems. If conception rates drop, the semen records can help determine whether the problem is related to a specific batch or supplier.

Monitoring and Evaluation

Regular monitoring of breeding performance is essential for identifying problems early. Key indicators to track include:

• Farrowing rate by parity and by month
• Litter size by parity and by month
• Weaning-to-estrus interval
• Return-to-estrus rate
• Semen usage per conception

These indicators should be reviewed monthly and compared to your herd's targets. If performance falls below targets, investigate the possible causes, including the breeding supplies and equipment in use. Your veterinarian can help interpret the data and identify the most likely causes of poor performance.

Common Failure Patterns in Breeding Supply Management

Temperature Mismanagement of Semen

One of the most common failures in artificial insemination programs is improper semen storage temperature. Semen that is too cold or too hot loses sperm viability, leading to reduced conception rates. This failure is often caused by inadequate temperature monitoring, malfunctioning storage units, or improper handling during transport to the breeding area.

Prevention requires a dedicated semen storage unit with temperature monitoring, staff training on proper handling, and protocols for responding to temperature excursions. If a temperature excursion occurs, flag the affected doses and consult your semen supplier or veterinarian before use.

Poor Hygiene During Insemination

Contamination of the reproductive tract during insemination can cause infections that reduce conception rates and increase returns to estrus. This failure is often caused by inadequate cleaning of the vulva before insemination, contaminated catheters, or improper catheter handling.

Prevention requires clear protocols for hygiene during insemination, including cleaning the vulva, using single-use catheters, and avoiding contamination of the catheter tip. Staff should be trained on these protocols and supervised until they demonstrate consistent compliance.

Inaccurate Heat Detection

Inaccurate heat detection leads to insemination at the wrong time, which reduces conception rates. This failure is often caused by inadequate boar exposure, insufficient time spent on detection, or poorly trained staff. The research on triptorelin treatment showed that sows treated without signs of estrus had a lower farrowing rate, [14] which reinforces the importance of accurate heat detection.

Prevention requires a consistent heat detection schedule, adequate boar exposure, and well-trained staff who can recognize the signs of standing estrus. Records of heat detection results should be reviewed regularly to identify sows with irregular estrus cycles.

Inadequate Biosecurity for Supplies

Supplies entering the farm can introduce pathogens if they are not properly managed. The study of breeding sites found that all sites received supply deliveries, including semen, small materials, drugs, bags, and equipment. [9] These deliveries represent a regular pathway for potential disease introduction.

Prevention requires a biosecurity plan that addresses supply deliveries, including disinfection of incoming supplies, separation of clean and dirty areas, and protocols for visitors and service providers. The survey of pig farms found that visitors and farmworkers scored lowest in external biosecurity, [10] which suggests that many farms could improve their protocols for people entering the farm.

Welfare and Safety Considerations

Animal Welfare in Breeding Operations

Breeding supplies should support the welfare of sows, boars, and piglets. Farrowing crates should allow sows to stand, lie, and nurse comfortably. Heat detection and insemination procedures should be performed calmly and without unnecessary stress. Piglet processing should be performed with appropriate pain management as recommended by your veterinarian.

The physical examination of swine should be performed with minimal handling of the animal. [13] This principle applies to breeding procedures as well. Well-designed facilities and equipment reduce the need for handling and restraint, which benefits both animal welfare and staff safety.

Worker Safety

Breeding operations involve working with large animals that can cause serious injury. Staff should be trained on safe handling techniques and should use appropriate personal protective equipment. This includes boots, gloves, and other protective clothing as required by your farm's safety protocols.

Ergonomic considerations are also important. Breeding tasks often involve repetitive movements, bending, and lifting. Work areas should be designed to minimize strain on workers, and staff should be trained on proper body mechanics. The ergonomic study of workplace organization in swine-breeding complexes highlights the importance of designing work areas to support worker health and efficiency. [26]

Food Safety and Regulatory Context

Breeding supplies can affect food safety through their impact on animal health and the use of veterinary products. The U.S. Food and Drug Administration provides resources on animal veterinary products, including regulations on drug use in food animals. [3] All drugs and veterinary products used in breeding operations should be used according to label instructions and with appropriate withdrawal periods as directed by your veterinarian.

The World Organisation for Animal Health provides resources on animal health and welfare that are relevant to breeding operations. [4] These resources address disease prevention, biosecurity, and animal welfare standards that apply to swine production.

Professional Escalation Criteria

When to Consult Your Veterinarian

You should consult your veterinarian in the following situations:

• Conception rates or farrowing rates fall below your herd's targets for two consecutive months
• Litter size decreases significantly from your herd's average
• Returns to estrus increase above expected levels
• You suspect semen quality problems or temperature excursions
• You are considering new breeding protocols or synchronization products
• You observe unusual signs of disease in breeding animals

Your veterinarian can help interpret your records, investigate potential causes, and recommend appropriate responses. Early intervention is essential for minimizing the impact of reproductive problems.

When to Consult Your Semen Supplier

You should consult your semen supplier in the following situations:

• Semen arrives with damaged packaging or at the wrong temperature
• Semen doses have passed their use-by date
• You observe poor conception rates associated with a specific semen batch
• You have questions about semen handling or storage
• You are considering changing your insemination protocol

Your semen supplier can provide information about the semen you purchased and can help troubleshoot problems related to semen handling or quality.

When to Consult a Reproduction Specialist

You should consider consulting a reproduction specialist in the following situations:

• You are implementing fixed-time insemination protocols
• You are considering low-dose insemination or intrauterine catheters
• You are evaluating the use of ovulation synchronization products
• You are experiencing persistent reproductive problems that have not responded to standard interventions
• You are planning significant changes to your breeding program

Reproduction specialists can provide expert advice on the latest techniques and can help you evaluate whether new technologies are appropriate for your operation.

Limitations and Practical Considerations

Technology Adoption and Economic Viability

New sperm technologies such as cryopreservation and sperm sexing have been known for many years but have not yet been integrated into commercial use in the pig industry. [7] The speed with which these technologies are accepted depends on the availability of efficient insemination procedures. When considering new technologies, evaluate the economic benefits against the costs of equipment, training, and potential changes in reproductive performance.

Supply Chain and Delivery Considerations

Supply deliveries are a regular feature of breeding operations, with all sites in one study receiving at least three supply deliveries per month. [9] Your supply management should account for delivery schedules, storage capacity, and the potential for delivery delays. Maintain adequate inventory of critical supplies to avoid disruptions to your breeding schedule.

Facility Design and Equipment Integration

The engineering technology of swine farming facilities continues to develop, with new designs and equipment becoming available. [27] When selecting breeding supplies, consider how they will integrate with your existing facilities and equipment. A supply that works well in one facility may not be appropriate for another due to differences in layout, ventilation, or management systems.

Frequently Asked Questions

What is the most important equipment for a swine artificial insemination program?

The most important equipment is a dedicated semen storage unit with temperature monitoring, insemination catheters appropriate for your herd, and hygiene supplies for clean insemination technique. Liquid semen extenders are designed to sustain sperm fertility for three to seven days, [16] so proper storage and handling are essential for maintaining semen quality from delivery to insemination.

How do I choose between cervical and intrauterine catheters?

The choice depends on the semen dose you are using and your herd's reproductive management approach. Traditional AI doses contain 2.5 to 3.0 billion motile sperm in 75 to 100 mL of extender, while low-dose protocols use 1.5 to 2.0 billion sperm in similar or reduced volumes. [16] Intrauterine catheters are designed for low-dose protocols and require proper training to use correctly. Consult your semen supplier or veterinarian for advice on the appropriate catheter type for your herd.

What heat detection aids are most effective for swine?

Boar exposure combined with back pressure testing is the standard method for heat detection in commercial sow breeding. [16] Other aids such as boar scent sprays and electronic detection devices can support but should not replace boar exposure and back pressure testing. Accurate heat detection is essential because insemination at the wrong time reduces conception rates.

How should I store and handle semen doses on the farm?

Semen should be stored in a dedicated unit that maintains the correct temperature range, with temperature monitoring to detect excursions. Liquid semen extenders are designed to sustain sperm fertility for three to seven days. [16] Transport containers should maintain temperature during movement from storage to the breeding area, and the time between removing semen from storage and completing insemination should be minimized.

What records should I keep for breeding supply management?

Maintain records of sow identification, weaning dates, estrus detection results, insemination dates, semen batch numbers, and farrowing outcomes. Also track supply inventory and usage, including catheters, semen doses, and other consumables. A breeding performance management system can support this analysis and help identify sows that should be culled. [25]

How do biosecurity concerns affect breeding supply selection?

Supply deliveries are a regular pathway for potential disease introduction, with all sites in one study receiving at least three supply deliveries per month. [9] Select supplies that can be cleaned and disinfected appropriately, use single-use items where disease transmission is a concern, and develop protocols for handling incoming supplies. Biosecurity practices for visitors and farmworkers often score lowest in assessments, [10] so pay particular attention to these areas.

What should I do if conception rates drop in my herd?

First, review your records to identify the pattern of the problem, including which sows are affected and when the problem started. Check your semen handling and storage procedures, heat detection accuracy, and insemination technique. If the problem persists for two consecutive months, consult your veterinarian to investigate potential causes and recommend appropriate responses.

When should I consider fixed-time artificial insemination?

Fixed-time artificial insemination can improve reproductive efficiency by reducing the costs associated with double or multiple inseminations. [14] However, the research on triptorelin treatment showed that sows treated without signs of estrus had a lower farrowing rate, [14] which means accurate heat detection remains important even with synchronization products. Discuss the options with your veterinarian to determine whether fixed-time insemination is appropriate for your herd.

Related Farming Guides

• Swine Artificial Insemination: Protocols, Equipment, and Success Factors
• Dairy Sire Selection for Herd Goals
• Apiary Water Supply and Heat Management
• Camel Breeding Management: Genetics, Reproduction, and Herd Improvement
• Cervid Breeding Management: Genetics, Reproduction, and Herd Improvement

References and Further Reading

• FAO Animal Production and Health. Food and Agriculture Organization of the United Nations.
• Animal Health and Welfare. USDA National Agricultural Library.
• Animal and Veterinary Resources. U.S. Food and Drug Administration.
• Animal Health and Welfare. World Organisation for Animal Health.
• Animal Production and Protection. USDA Agricultural Research Service.
• Insulin-transferrin-selenium supplementation improves porcine embryo production in vitro.. Zygote (Cambridge, England), 2024.
• Challenges in pig artificial insemination.. Reproduction in domestic animals = Zuchthygiene, 2006.
• Large Animal Models of Diabetes.. Methods in molecular biology (Clifton, N.J.), 2020.
• Contacts posing risks of disease introduction in swine breeding herds in Quebec, Canada: Is the frequency of contacts associated with biosecurity measures?. Preventive veterinary medicine, 2023.
• Characterization of biosecurity practices and viral infections on pig farms in Hong Kong.. Preventive veterinary medicine, 2025.
• Evaluation of the immunization effects of needle-free injection for four common porcine vaccines.. Vaccine, 2025.
• Three Main Inducers of Alphacoronavirus Infection of Enterocytes: Sialic Acid, Proteases, and Low pH.. Intervirology, 2018.
• Physical examination of swine.. The Veterinary clinics of North America. Food animal practice, 1992.
• Use of a Vaginally Administered Gel Containing the GnRH Agonist Triptorelin and a Single, Fixed-Time Artificial Insemination in Pigs under Commercial Conditions: Productive and Economic Impacts.. 2024.
• Use of a Vaginally Administered Gel Containing the GnRH Agonist Triptorelin and Fixed Time and Single Artificial Insemination of Pigs under Commercial Conditions. Productive and Economic Impact. 2024.
• Artificial insemination in pigs today.. 2016.
• Associations of sow characteristics, boar semen traits, and seminal plasma metabolomics with fertility outcomes following artificial insemination.. 2026.
• Feeding All-Trans Retinoic Acid to Pregnant Sows Regulates the Development of the Pulmonary Nervous Systems of Neonatal Pigs.. 2026.
• Long term study of haematological and biochemical parameters in pigs with different embryo origins.. 2026.
• Modeling energy and amino-acid requirements of sows: a way towards the optimization of nutritional supplies. 2023.
• Dry feed and liquid feed feeding system for pregnant sow and farrowing sow. 2012.
• Pork Profit Outlook Gets Trimmed. 2012.
• Vitalité des porcelets issus de l'hyperprolificité. 2010.
• Monitoring of drinking water quality in intensive pig production concerning animal welfare. 2008.
• Development for Breeding Performance Management System on Pig Farms. Conference on Control Technology and Applications, 2007.
• Ergonometric Study of Work Place Organization in Swine-Breeding Complexes.. Meditsina Truda I Promyshlennaya Ekologiya, 1987.
• Analysis of Research Status and Development on Engineering Technology of Swine Farming Facilities. Nongye Jixie Xuebao Transactions of the Chinese Society for Agricultural Machinery, 2018.
• Development of Models for Fermented Mixed Feed Production for Swine. Journal of Biosystems Engineering, 2019.
• COMPUTER-AIDED FARROWING SCHEDULING.. Paper American Society of Agricultural Engineers, 1984.
• Swine management errors.. Modern Veterinary Practice, 1984.

This article is educational and is not a substitute for veterinary diagnosis, treatment, public-health guidance, or regulatory reporting.