# Production Records for Pig Farms ## Key Takeaways - Production records are critical in swine operations due to dense populations and rapid throughput, enabling early detection of group-level performance declines (e.g., reduced Average Daily Gain, increased mortality) that are not readily apparent from individual animal observation. - Key breeding herd metrics like Services per Conception (SPC) above 2.0 and Farrowing Rate below 85% warrant investigation into boar fertility, heat detection accuracy, or reproductive health issues, while extended Wean-to-Estrus Intervals (over 7 days) indicate potential lactation feed intake or body condition deficits. - Farrowing records, specifically differentiating stillbirths (fresh vs. decomposed) and tracking pre-weaning mortality causes (crushing, starvation, chilling), are vital for identifying management-related issues in farrowing crate design, environmental temperature, and piglet supervision. - Nursery and Grow-Finish performance is best assessed through Average Daily Gain (ADG) and Feed Conversion Ratio (FCR), with persistent declines in ADG across successive groups suggesting environmental or disease challenges, and sudden FCR increases indicating potential health, environmental, or feeder setting problems. - Comprehensive record-keeping extends to feed deliveries (batch numbers for traceability), health events (treatment compliance and withdrawal times), environmental parameters (temperature, ventilation), and financial data (cost per pig), all of which are essential for diagnostic accuracy and economic optimization. --- Good production records answer the question "how are we actually doing?" , not how you think you are doing, but what the numbers show. [Pig farming](/knowledge/animal-farming/swine/pig-farming-breeding-farrowing-nursery-grow-finish-nutrition-and-biosecurity) involves many simultaneous processes across multiple stages of production, each with its own indicators. Without records, problems accumulate invisibly until they show up as poor financial returns or unexplained mortality. With records, most problems appear weeks or months earlier, when correction is cheaper and less disruptive. This guide describes a practical record system organized by production stage , breeding herd, farrowing, nursery, grow-finish , along with feed, health, environmental, and cost records. It covers what to measure, how to interpret it, and when the numbers should prompt professional consultation. --- ## At a Glance | Record Category | Core Indicators | Review Frequency | |---|---|---| | Breeding herd | Services per conception, farrowing rate, wean-to-estrus interval | Weekly/monthly | | Farrowing | Total born, live born, stillbirths, mummies, pre-weaning mortality | Per farrowing group | | Nursery | Mortality rate, average daily gain (ADG), feed intake | Weekly/per group | | Grow-finish | ADG, [feed conversion ratio](/knowledge/animal-farming/poultry/feed-conversion-ratio-measuring-improving-poultry-efficiency) (FCR), mortality, uniformity | Weekly/per group | | Feed | Delivery dates, batch numbers, usage by phase, shrink | Per delivery/monthly | | Health | Treatments by type, mortality with observation notes | Daily/weekly | | Environment | Temperature, ventilation settings, alarm events | Daily/per alarm | | Financial | Feed cost per pig produced, mortality cost, income per pig space | Monthly/quarterly | --- ## Why Records Matter More in Swine Than Many Species Swine operations often manage large, dense populations moving through multiple buildings in rapid succession. Individual animal identification is impractical for market pigs in most systems (though it is essential for breeding stock). This means problems typically manifest as changes in group-level metrics , a shift in pre-weaning mortality, a decline in average daily gain in a grow-finish barn, a drop in farrowing rate , rather than as visibly sick individual animals. By the time a problem is obvious to casual observation, it has usually persisted through multiple groups. Records make it visible after one group, sometimes earlier, and they allow you to distinguish a single-event problem from a recurring trend requiring a systematic response. --- ## Breeding Herd Records ### Individual Sow and Gilt Identification The foundation of any breeding herd record system is reliable individual identification , ear tags, electronic identifiers, or tattooing. Every breeding and farrowing event should be linked to a specific animal's permanent record. This enables calculation of lifetime productivity metrics and identification of animals that consistently underperform. ### Key Breeding Indicators **Services per conception (SPC):** The number of services (natural matings or artificial inseminations) required to achieve a confirmed pregnancy. Values persistently above 2.0 are worth investigating for boar/semen quality, heat detection accuracy, mating timing, or female reproductive status. **Farrowing rate:** The proportion of served females that farrow. Industry benchmarks vary, but consistently below 85 percent in a well-managed herd warrants investigation. Record which females failed to farrow and whether they returned to estrus, were found non-pregnant at preg-check, or were culled for other reasons , this breakdown is more diagnostic than the rate alone. **Wean-to-first-service interval and wean-to-estrus interval:** The time between weaning and when a sow first shows and is bred to estrus. Extended intervals , typically more than seven days on average , reduce the number of litters per sow per year and are often connected to lactation feed intake, body condition at weaning, or seasonal effects. Track this per sow and as a herd average. **Returns to service:** First-service returns (females returning to estrus 18,24 days post-service) suggest fertilization failure or early embryonic loss. Late returns (beyond 24 days) or irregular returns may indicate embryonic loss at varying stages. High return rates warrant veterinary investigation. **Parity distribution:** Record the parity (litter number) of each breeding female. A herd with an aging parity profile , too many sows in parities 5 and above , or an excessively young profile indicates problems with culling strategy and replacement rate. ### Sow Culling and Retention Records For each culled sow, record parity, reason for culling (reproductive failure, lameness, body condition, age policy, death), and whether the culling was planned or emergency. This data distinguishes a herd with thoughtful planned turnover from one losing sows to uncontrolled attrition. --- ## Farrowing Records Record the following for each litter at farrowing: - **Date farrowed and sow ID** - **Total born:** all piglets delivered, including stillbirths and mummies - **Live born:** piglets alive at the end of farrowing assistance - **Stillbirths (fresh and decomposed):** differentiated because fresh stillbirths suggest intrapartum problems while decomposed mummies suggest earlier fetal death - **Mummies:** very small, often discolored piglets that died in utero early in gestation - **Birth weight** (individual or litter average, depending on your system) - **Cross-fostering and litter equalization records:** which pigs were moved from which litter and to which sow, on what date **Pre-weaning mortality:** Calculated as deaths between birth and weaning divided by live-born pigs. Record the cause or likely cause (crushing by sow, starvation, chilling, disease) for each death, or at minimum a category. Crushing and starvation/chilling together often represent 60,80% of pre-weaning deaths and are strongly influenced by management , farrowing crate condition, environmental temperature, piglet supervision intensity. Tracking causes rather than only the rate directs improvement efforts. **Litter weaning weight and weaning age:** Standardize weaning age as much as possible to make comparisons meaningful. Weaning weights reflect sow lactation performance and piglet vigor during the nursing period. --- ## Nursery Records Nursery pigs are weaned animals up to approximately 25,30 kg (the precise endpoint varies by system). This is a high-risk phase; immune immaturity, dietary transition, and social stress combine to make these pigs vulnerable. **Record per group or room:** - Number of pigs placed and source (farrowing room or rooms) - Date placed and average weaning age and weight - Daily or weekly mortality with cause or observation notes - Feed deliveries and consumption (or estimated from feeder checks) - Weekly weights or final weights at transfer to grow-finish **Key calculated metrics:** - **Nursery mortality rate:** Deaths as a percentage of pigs placed. Persistently above 2,3% in a healthy system is worth evaluating; some systems aim lower. - **Average daily gain:** Total weight gain divided by pig-days on feed. Declining ADG across successive groups in the same room often signals environmental or disease problems , compare to a baseline from your own recent history. - **Feed conversion ratio (FCR):** kg of feed consumed per kg of gain. Accurate FCR calculation requires knowing both feed delivered and weight gained, which many nursery operations only track loosely. Even an approximate FCR trend over time is useful. --- ## Grow-Finish Records The grow-finish period from roughly 25 kg to market weight generates most of the farm's revenue. Records here connect management to economic outcome more directly than any other phase. **Record per group or room:** - Placement date, number placed, source, and average placement weight - Market date, number sold, average market weight, and carcass yield (if available from the packer) - Number died and date, with observation notes - Number removed early (culls) and condition at removal - Feed deliveries, batch numbers, and quantities **Key metrics:** - **Average daily gain:** The most basic indicator of grow-finish efficiency. Benchmark against your own history by season and barn, not just industry averages, because local genetics and feed programs vary. - **Feed conversion ratio:** Critical to profitability. Track carefully , FCR in the 2.5,3.0 range is typical but varies with genetics, diet energy density, health status, and management. Sudden increases in FCR without corresponding changes in diet warrant investigation of health, environmental conditions, or feeder settings. - **Mortality rate:** Deaths as a percentage of pigs placed. Track separately from culls removed alive. - **Uniformity at market:** The coefficient of variation in market weights within a group. High variation indicates sorting problems, disease events, or feed access issues earlier in the period. If packer data is available (yield grade, carcass weight, percent lean, defects), these become the most economically useful records a grow-finish operation can maintain. Trends in dressing percentage or carcass quality scores visible in packer reports often flag management issues invisible at the farm level. --- ## Feed Records Feed is typically the largest single cost in pig production. Records should capture: - **Delivery dates, supplier, batch or lot numbers, and quantities** for all feeds and premixes - **Usage by barn or phase** , how much feed was placed in which barn for which group - **Feed shrink** , the gap between delivered feed and feed accounted for in pig gain; elevated shrink suggests waste, spoilage, vermin access, or measurement error If you experience a health event or performance anomaly, having the feed lot number and delivery date allows rapid communication with your nutritionist and the supplier to determine whether diet was a contributing factor. --- ## Health Records Health records serve two purposes: managing individual treatment compliance (especially withdrawal times for any veterinary products used under veterinary direction) and identifying patterns that suggest systemic problems. **Record for each health event:** - Date and barn or room - Number of animals affected and their identification if feasible - Clinical signs observed - Action taken and by whom - Outcome At minimum, track mortality separately from morbidity. A barn where pigs are dying at normal rates but require frequent treatment for respiratory signs is a different problem from a barn with elevated mortality but few clinical observations , and records make that distinction visible. **Withdrawal time compliance:** Any veterinary product used must have withdrawal time records maintained to ensure market animals are compliant. This is both a legal and food-safety obligation. Maintain these under the oversight of a licensed veterinarian who issues the prescription or Veterinary Feed Directive (VFD). Do not record specific drug doses, products, or treatment protocols in this document; consult your veterinarian for a written herd health program. --- ## Environmental Records Ventilation and temperature management has direct effects on pig performance, health, and welfare. Record: - **Daily temperature readings** in each barn (minimum and maximum, or continuous logger data) - **Ventilation settings** (minimum ventilation rate, setpoints, fan stages activated) - **Alarm events** , when alarms activated and what action was taken - **Power outage events** and duration A barn that regularly exceeds target temperature ceilings in summer, or drops below minimum temperatures in winter, will show corresponding performance declines in that cohort's records , connecting environment and outcome is only possible if both are documented. --- ## Financial Records Production records gain their full value when connected to costs. Maintain: - **Feed cost per pig marketed** or per kilogram of gain - **Mortality cost** , pigs lost multiplied by their estimated value at time of death - **Medication and veterinary cost** per pig - **Revenue per pig marketed** and net margin per pig space per year These metrics, tracked consistently over time, reveal whether operational improvements are translating into financial improvements. --- ## Paper vs. Software Simple paper records organized by room, group, and date are sufficient for small operations and are reliable when maintained consistently. Standardized paper forms reduce the chance of forgetting key data fields. Software systems , ranging from spreadsheet templates to purpose-built swine management platforms , simplify calculation of indicators, enable trend graphing, and allow benchmarking across barns. Many pork integrators require electronic data in specified formats. Whatever system you use, the data is only as good as the consistency of entry. --- ## Common Mistakes **Recording data but never reviewing it.** Data collection without regular analysis is wasted effort. Schedule monthly reviews of key indicators; compare to the same period last year and to your own target ranges. **Using only industry benchmarks for comparison.** Published industry benchmarks reflect many different genetics, diets, and systems. Your own historical baseline , what this barn or this sow group has done before , is a more relevant comparison for identifying change. **Recording outcomes but not causes.** "Pre-weaning mortality: 8%" is less useful than "pre-weaning mortality: 8%, of which 55% crushing, 30% starvation, 15% other." Causes direct the response. **Inconsistent group definitions.** If "nursery mortality" means different things across different records , sometimes including transfers, sometimes not , trend analysis is invalid. Define each metric explicitly and stick to the definition. **Losing records when staff turn over.** Records that live only in one employee's memory or personal notebook are lost when they leave. All records should be written or entered in a shared system. --- ## When to Involve a Professional Involve your **veterinarian** when health or mortality trends change unexpectedly, especially across multiple barns or production stages simultaneously. Involve a **swine nutritionist** when feed conversion ratio deteriorates without an obvious environmental or health explanation, or when phase feeding program performance diverges from expectations. Involve a **reproductive specialist or AI technician** when farrowing rate or litter size declines trend downward over multiple months. Involve a **swine extension specialist** ([Pork Information Gateway](https://www.porkgateway.org/) maintains extension resources from multiple land-grant universities) when you want to benchmark your records against regional or national data or need help interpreting ambiguous trends. --- ## Frequently Asked Questions ### What records does the Pork Quality Assurance Plus (PQA Plus) program require me to maintain? PQA Plus® from the National Pork Board requires producers to maintain records demonstrating compliance with their written herd health plans, including treatment records, veterinary oversight documentation, and withdrawal time compliance. Specific record types and retention periods are outlined in the current PQA Plus program materials and your site assessment. Consult the most current PQA Plus version from the National Pork Board, as program requirements are periodically updated. ### How long should I retain production records? Retention requirements vary. Regulatory programs typically require a minimum of one to three years for treatment and application records. For production performance records, keeping three to five years of data allows meaningful trend analysis and is useful for financial planning, lender documentation, and responding to buyer audits. Electronic records stored with backup copies are easier to retain than paper. ### How do I calculate farrowing rate correctly? Farrowing rate is calculated as the number of females that farrow divided by the number of females served during a defined window, expressed as a percentage. For example, if 100 sows were served in January and 88 farrowed in the expected window (approximately 114 days later), farrowing rate is 88%. The denominator should be the total served, including those that returned to estrus, were found open, were culled pregnant, or died , not just those that completed the process. Excluding non-farrowings from the denominator overstates performance. ### What is a useful minimum set of records for a small farrow-to-finish operation? For a small operation with limited administrative capacity, prioritize: sow breeding and farrowing records (linked to individual animal ID), litter live-born and pre-weaning mortality counts, nursery placement and final weight with mortality, and market weights and dates. Feed delivery records and a simple health event log complete a functional minimum. These seven data streams will capture the majority of management signals without requiring a complex system. --- ## Related Clinical & Scientific Guides * [Pig Enrichment Programs and Behavior Monitoring](/knowledge/animal-farming/swine/pig-enrichment-programs-and-behavior-monitoring) * [Swine Handling Facility Design for Safe Pig Movement](/knowledge/animal-farming/swine/swine-handling-facility-design-safe-pig-movement) * [Swine Feeding Management for Grow-Finish Pigs](/knowledge/animal-farming/swine/swine-feeding-management-for-grow-finish-pigs) ## References and Further Reading 1. [Pork Information Gateway](https://www.porkgateway.org/) , Peer-reviewed and extension-sourced production guides from U.S. land-grant universities; searchable by topic including reproductive records and grow-finish benchmarking. 2. National Pork Board , PQA Plus Program , Current program requirements for record-keeping, herd health plans, and site assessment. 3. [Iowa State University Extension , Swine Publications](https://www.extension.iastate.edu/swine/) , Practical factsheets on farrowing, nursery, and grow-finish performance metrics. 4. University of Minnesota Extension , Swine , Research-based guides on reproductive management, nursery management, and herd benchmarking. 5. [USDA NASS , Quarterly Hogs and Pigs Report](https://www.nass.usda.gov/Publications/Todays_Reports/reports/hgpg0626.pdf) , Industry inventory and production data for contextual benchmarking. 6. WOAH Terrestrial Animal Health Code , Chapter on Pigs , International welfare and biosecurity standards applicable to commercial swine production. 7. Deen, J., & Driesen, S. (2018). *Reproductive Record Interpretation for Swine Herds.* University of Minnesota Extension. Available through extension.umn.edu. 8. Patience, J. F., Thacker, P. A., & de Lange, C. F. M. (Eds.). *Swine Nutrition Guide.* Prairie Swine Centre/University of Saskatchewan , industry-standard nutrition reference covering feed conversion benchmarks. 9. American Association of Swine Veterinarians (AASV). *Guidelines for Herd Health Programs.* [aasv.org](https://www.aasv.org/) , Guidance on veterinary oversight, diagnostic expectations, and health record standards. 10. Holden, P., & Ensminger, M. E. *Swine Production and Nutrition.* Interstate Publishers , foundational reference on production system record interpretation. --- ## Related Farming Guides - [Starting a Pig Farm](/knowledge/animal-farming/swine/starting-a-pig-farm) - [Manure Management for Pig Farms](/knowledge/animal-farming/swine/manure-management-for-pig-farms) - [Sow Body Condition and Feeding Management](/knowledge/animal-farming/swine/sow-body-condition-and-feeding-management) - [Farrowing House Preparation and Sow Care](/knowledge/animal-farming/swine/farrowing-house-preparation-and-sow-care) - [Grow-Finish Pig Feed Efficiency](/knowledge/animal-farming/swine/grow-finish-pig-feed-efficiency) --- > **Educational Notice:** This guide provides general educational information about production record systems for swine operations. It does not constitute veterinary, legal, nutritional, or financial advice. Record-keeping requirements may vary by operation type, regulatory jurisdiction, buyer program, and integration contract. Consult your veterinarian for a written herd health plan, your nutritionist for diet-specific performance benchmarks, and your compliance advisor for applicable regulatory recordkeeping obligations.