# Swine Mortality Management and Deadstock Planning


## Key Takeaways

- Effective swine mortality management necessitates a robust operational framework integrating dedicated storage with impermeable surfaces, temperature mitigation, and capacity for 1-2 weeks of mortality, alongside scheduled, biosecure pickup logistics.
- Biosecurity during deadstock handling is paramount, requiring designated zones, footbaths, appropriate personal protective equipment (PPE) such as gloves and coveralls, and strict protocols to prevent commingling of carcasses with live animals, feed, or water sources.
- Environmental safeguards include leachate containment, groundwater monitoring, vector and odor control, and maintaining buffer zones from water bodies, with disposal methods like burial, incineration, or composting subject to stringent regulatory oversight and permits.
- Routine mortality documentation, including suspected cause, weight, and disposal method, is critical for trend analysis and early outbreak detection, with sudden increases (e.g., exceeding 1% of herd weekly) or unknown causes warranting immediate veterinary and state animal health official notification.
- Emergency preparedness for large-scale mortality events (disease outbreaks, natural disasters) requires pre-arranged contingency disposal methods such as composting, incineration, or rendering surge capacity, and immediate activation of emergency plans when routine procedures are overwhelmed.
- Zoonotic risks from handling carcasses necessitate appropriate PPE, including waterproof gloves, impermeable coveralls, and potentially respiratory protection, to mitigate exposure to pathogens like *Streptococcus suis* and hepatitis E virus.

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Swine mortality management is the systematic process of handling, storing, and disposing of deadstock in a manner that protects herd health, minimizes environmental impact, and complies with regulatory requirements. Effective deadstock planning must integrate storage capacity, pickup logistics, biosecurity protocols, environmental safeguards, regulatory checks, and emergency preparedness into a single operational framework.

## At a Glance

| Aspect | Core Considerations |
|--------|----------------------|
| Storage | Dedicated, impermeable surface, covered containers, temperature mitigation, capacity for 1,2 weeks of mortality |
| Pickup | Scheduled and on,call service, biosecure vehicle access, cleaning and disinfection protocols |
| Biosecurity | Designated deadstock handling zone, footbath, gloves, limit carcass commingling with live animals |
| Environmental safeguards | Leachate containment, groundwater monitoring, vector and odor control, buffer from water bodies |
| Regulatory checks | State/local permits for on,farm disposal, transporter licenses, record,keeping for mortality numbers and disposal method |
| Emergency planning | Large,scale mortality events (disease outbreak, natural disaster), pre,arranged contingency disposal (composting, incineration, rendering surge capacity) |

## System Context and Planning Decisions

Mortality is an unavoidable reality in swine production. Routine losses from stillbirth, crushing, and endemic disease typically amount to 2,5 % of the herd annually, though individual farm variation exists. Larger catastrophic losses due to foreign animal disease (e.g., [African swine fever](/knowledge/bioinformatics/african-swine-fever-computational-models-for-early-detection-and-spread-prediction-in-wild-boar-populations)) or natural disasters require a separate emergency plan. The FAO Animal Production and Health guidance emphasizes that disposal method must be matched to farm size, geographic location, and available infrastructure.

### On,Farm Versus Off,Farm Disposal

Planning begins with a decision between on,farm and off,farm disposal.

- **Off,farm disposal (rendering)** transfers biosecurity risk to a licensed facility but requires reliable pickup and biosecure carcass storage on the farm until collection. Rendering is the preferred method under the USDA APHIS Livestock and Poultry Disease framework for routine mortality in regions with rendering plant access.
- **On,farm options** include burial (increasingly restricted), incineration, composting, and alkaline hydrolysis. Each has regulatory, biosecurity, and environmental trade,offs. The WOAH Terrestrial Animal Health Code advises that on,farm disposal must prevent disease transmission to wildlife, scavengers, and neighboring herds.

### Biosecurity During Deadstock Handling

Deadstock is a high,risk material for pathogen spread. The Merck Veterinary Manual notes that carcasses can harbor bacteria, viruses, and prions capable of surviving in soil or compost for weeks to months. Breed,to,wean and grow,finish operations differ in the relative importance of endemic versus exotic pathogens, but the core biosecurity principle remains constant: isolate carcasses from all live animals and from feed and water sources.

A qualitative study (PubMed record 37242391) identified that feed delivery vehicles and personnel can transfer infectious material from mortality storage areas if traffic patterns are not separated. Farms should designate a one,way route for deadstock movement and restrict access to designated handling staff only.

### Core Management Framework

1. **Daily assessment**: Record each mortality event including suspected cause, weight, and disposal method. Without consistent documentation, trend analysis and early outbreak detection become impossible.
2. **Storage infrastructure**: Maintain a dedicated storage area with impermeable flooring (concrete or heavy plastic), covered containers to exclude rain and scavengers, and capacity adequate for at least one week of typical mortality. In hot climates, time to pickup shortens because carcass decomposition accelerates and leachate production increases.
3. **Handling protocols**: Staff must wear dedicated boots and gloves during carcass collection, and footbaths should be placed at the storage area entrance and exit. Contaminated vehicles and equipment should be cleaned and disinfected before leaving the deadstock zone.
4. **Record keeping**: Many jurisdictions require logs of deadstock numbers, disposal method, and date. The USDA National Animal Health Monitoring System recommends records that allow tracking of mortality trends as part of a comprehensive herd health plan.
5. **Contingency plan**: For large,scale mortality, the emergency plan must specify alternative disposal methods that meet environmental safeguards and can be rapidly activated. The WOAH code advocates pre,arranged agreements with rendering plants, mobile incinerators, or composting specialists before an emergency occurs.

Professional escalation is warranted when mortality suddenly exceeds 1 % of the herd per week, when cause of death is unknown or suggests a notifiable disease, or when existing storage and disposal capacity is overwhelmed. In such cases, the attending veterinarian and state animal health official must be notified immediately, and the emergency plan should be activated instead of attempting to adapt routine procedures.

## Facilities and Environment

Deadstock storage and processing areas must be sited to minimize cross,contamination with live,animal zones, feed storage, and water sources. The [WOAH Terrestrial Animal Health Code](https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/) advises that mortalities be collected and held in dedicated, impermeable containers or structures that prevent scavenger access and leachate escape. Common options include freezer units (for rapid cooling to inhibit decomposition and pathogen proliferation), covered concrete pads for composting, or purpose,built incineration chambers. Each method requires specific environmental safeguards: freezers must be maintained at temperatures below ,18 °C to halt microbial activity, while composting pads need a roof or tarp to control moisture and runoff. The [USDA APHIS Livestock and Poultry Disease](https://www.aphis.usda.gov/livestock-poultry-disease) portal emphasizes that all storage areas should be located at least 50 m from watercourses and wells, though exact setbacks vary by state regulation. Producers must verify local environmental agency requirements regarding odor control, groundwater monitoring, and reporting of disposal volumes.

The physical condition of the storage environment directly affects biosecurity. A study on potential biosecurity risks associated with feed delivery ([A qualitative study to identify potential biosecurity risks associated with feed delivery](https://api.elsevier.com/content/abstract/scopus_id=84964780485), 2014) highlighted that equipment shared between deadstock and feed handling is a common contamination pathway. Therefore, dedicated tools (buckets, forks, loaders) and separate designated access routes for carcass removal should be established. Drainage away from the storage pad, regular cleaning with approved disinfectants (e.g., sodium hydroxide or peracetic acid formulations), and documented maintenance schedules are baseline expectations.

## Production,Stage Decisions and Mortality Pattern Recognition

Mortality rates and cause profiles differ across [swine production stages](/knowledge/animal-farming/swine/swine-production-stages-from-farrowing-to-finishing). Sow mortality often results from periparturient complications, lameness, or gastric ulcers, nursery mortality is frequently linked to enteric and respiratory pathogens, finisher mortality may reflect sudden death syndromes, [porcine reproductive and respiratory syndrome](/knowledge/viruses/general/porcine-reproductive-and-respiratory-syndrome-genomic-surveillance-and-vaccine-strategies-using-bioinformatics) (PRRS) outbreaks, or heat stress. The [USDA National Animal Health Monitoring System](https://www.aphis.usda.gov/livestock-poultry-disease/nahms) produces periodic reports detailing stage,specific mortality benchmarks, but producers should track their own on,farm data instead of rely solely on published averages. When mortality clusters occur in a particular age group, veterinary consultation is needed to identify underlying disease and adjust the disposal plan accordingly,for instance, a suspected notifiable disease may require whole,carcass incineration or deep burial as per WOAH guidelines instead of routine composting.

Planning for peak mortality events (e.g., after a devastating heat wave or a disease outbreak) requires advance capacity calculation. A composting platform designed for typical weekly mortalities may be overwhelmed during an outbreak. In such cases, the static aerated composting method using carbonaceous bulking agents (e.g., rice hulls with sawdust) has been shown to effectively contain certain viruses. Research on [Static Aerated Composting of African Swine Fever Virus,Infected Swine Carcasses with Rice Hulls and Sawdust](https://api.elsevier.com/content/abstract/scopus_id=85160323627) (2023) indicates that maintaining internal temperatures above 55 °C for a sustained period inactivates the virus, though factors such as pile dimensions, aeration rate, and moisture content influence success. Producers should work with extension services to pre,size emergency composting pads and secure contracts for incineration or rendering services.

## Records and Regulatory Checks

Documentation of deadstock management is a legal requirement in most jurisdictions. The [USDA APHIS Livestock and Poultry Disease](https://www.aphis.usda.gov/livestock-poultry-disease) site provides templates for mortality logs that include date, number of animals, weight, presumed cause, disposal method, and the name of the person performing the disposal. These records support both environmental compliance (showing that carcasses were handled within required time windows) and disease surveillance. In the event of a foreign animal disease investigation, incomplete records can delay response and may lead to regulatory penalties. Monthly audits of the log against disposal invoices or composting temperature charts are a practical monitoring step. If discrepancies appear, immediate investigation and correction are necessary.

## Welfare, Worker Safety, and Zoonotic Risks

Removing dead animals promptly from pens is an animal welfare obligation. Decomposing carcasses emit ammonia and other gases that stress remaining pen mates, and the presence of dead pigs can disrupt feeding and resting behavior. The [Merck Veterinary Manual](https://www.merckvetmanual.com/) notes that any delay increases the risk of cannibalism and the spread of infectious agents. From a worker safety perspective, handling carcasses exposes personnel to zoonotic pathogens such as *Streptococcus suis*, *Brucella suis*, and hepatitis E virus. A qualitative study of biosecurity practices ([A qualitative study to identify potential biosecurity risks associated with feed delivery](https://api.elsevier.com/content/abstract/scopus_id=84964780485)) found that inadequate use of personal protective equipment (PPE) during deadstock removal was a recurring gap. Standard PPE for these tasks includes waterproof gloves, impermeable coveralls, rubber boots that can be disinfected, and respiratory protection if indoor composting is performed. Training in lifting technique and the use of mechanical aids (e.g., cart or front,end loader) reduces musculoskeletal injury.

[Food safety](/knowledge/bacteria/livestock-bacteria/cooking-chicken-bacteria-prevention) implications arise when deadstock is rendered or composted and the end product is applied to crop land. The [FAO Animal Production and Health](https://www.fao.org/animal-production/en/) guidance stresses that composted swine carcasses must not be used on pastures grazed by food,producing animals until a sufficient waiting period has elapsed (commonly 90 days), though no universal standard exists. Producers who sell rendered products to feed manufacturers must confirm that their rendering partner follows [WOAH](https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/) animal,by,product regulations.

## Failure Patterns and Practical Monitoring

Common failures in deadstock management include inadequate cooling or container capacity during summer, composting piles that do not reach required temperatures due to insufficient carbon or incorrect moisture, and delayed pickup by rendering services during holidays or epidemics. Each failure pattern can be identified through simple monitoring: daily temperature logging at multiple depths in a compost pile, weekly inspection of freezer operation (thermometer check), and a written communication log with the removal service. The [PubMed record 37242391](https://pubmed.ncbi.nlm.nih.gov/37242391/) (a review of carcass disposal during disease outbreaks) emphasizes that reliance on a single disposal method creates vulnerability, a contingency plan should include at least two options (e.g., on,site composting and a contract with an incineration facility). Regular drills,such as simulating a 100,animal die,off,help test capacity and identify logistical bottlenecks before a real crisis occurs.

Monitoring also extends to environmental safeguards. Leachate from compost piles or uncovered carcass storage can contaminate groundwater, thus, testing nearby wells for nitrate and bacterial indicators every six months is a prudent practice, even if not mandated locally. The [USDA APHIS](https://www.aphis.usda.gov/livestock-poultry-disease/nahms) offers checklists for environmental self,audits, but specific action thresholds (e.g., an increase in coliform counts above baseline) should be established with a veterinarian or environmental consultant.

## Nutrition and Water Considerations

While not a primary driver of deadstock planning, nutrition and water quality can influence mortality patterns that dictate disposal requirements. Feeds contaminated with mycotoxins, for example, can cause sudden death in finishing pigs, leading to a sudden spike in carcass volume. The [PubMed record 25969585](https://pubmed.ncbi.nlm.nih.gov/25969585/) (a study on hazardous feed ingredients) underscores that routine mycotoxin screening and water bacteriology testing help anticipate such events. If mortality increases abruptly without an obvious infectious cause, feed and water analyses should be part of the diagnostic workup, and the disposal plan should be adjusted to accommodate potentially toxic carcasses (which may require incineration instead of composting to prevent toxin persistence in the environment).

In summary, an effective deadstock plan integrates facility design, stage,specific response protocols, diligent record,keeping, routine monitoring of both process and environment, and clear escalation paths to veterinary and regulatory professionals. Producers who embed these elements into daily operations reduce biosecurity risk, protect worker and animal welfare, and stay prepared for emergencies.

## Health Observation and Biosecurity in Mortality Management

Routine health observation forms the foundation of effective deadstock planning. Farm personnel should conduct daily inspections of all pens, noting any animals that appear lethargic, anorexic, or display abnormal posture or respiration. The [USDA National Animal Health Monitoring System](https://www.aphis.usda.gov/livestock-poultry-disease/nahms) reports that early detection of clinical signs can reduce mortality rates by enabling timely intervention. A sudden increase in deadstock across multiple age groups or pens warrants immediate investigation. [Merck Veterinary Manual](https://www.merckvetmanual.com/) advises recording the number, location, and approximate time of death for each carcass, as this information supports diagnostic efforts and helps differentiate between sporadic losses and an outbreak.

Biosecurity measures must extend to all aspects of carcass handling. The [WOAH Terrestrial Animal Health Code](https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/) specifies that deadstock storage and disposal areas should be located at least 100 meters from live animal facilities, feed storage, and water sources. Dedicated tools, clothing, and footwear for mortality collection reduce the risk of pathogen transfer back to healthy animals. Disinfection stations at the entrance and exit of the mortality area are essential. A qualitative study of feed delivery biosecurity ([Scopus 84964780485](https://api.elsevier.com/content/abstract/scopus_id/84964780485)) demonstrated that contaminated equipment and vehicle tires can introduce infectious agents, the same principle applies to deadstock pickup vehicles. Producers should require haulers to follow clean,in,clean,out protocols and avoid driving through active production areas.

Carcass storage prior to pickup or on,site disposal requires careful management to limit disease spread. Leak,proof containers, lined bins, or dedicated freezer units minimize environmental contamination and discourage scavengers. The [FAO Animal Production and Health](https://www.fao.org/animal-production/en/) guidelines emphasize that storage times should be kept as short as possible, especially in warm climates where decomposition accelerates pathogen release. If composting is used as a holding method, the material must be contained to prevent leachate entering soil or waterways. The [USDA APHIS Livestock and Poultry Disease](https://www.aphis.usda.gov/livestock-poultry-disease) resources note that static aerated composting of African swine fever virus,infected swine carcasses, when done with appropriate carbon sources such as rice hulls and sawdust, can reduce viral infectivity ([Scopus 85160323627](https://api.elsevier.com/content/abstract/scopus_id/85160323627)). However, this process requires strict temperature monitoring, moisture control, and a minimum retention period to ensure pathogen inactivation.

## Diagnostic Investigation and Veterinary Escalation

When mortality exceeds baseline levels,typically defined as a doubling of the herd’s average daily death loss over three consecutive days,diagnostic testing should commence. The [USDA APHIS Livestock and Poultry Disease](https://www.aphis.usda.gov/livestock-poultry-disease) portal provides guidance on sample collection, including fresh lung, liver, spleen, and lymph nodes from recently deceased animals. Blood samples from live animals in the same airspace are also informative. Submitting samples to a veterinary diagnostic laboratory is critical for identifying the causative agent, especially for reportable diseases such as African swine fever, classical swine fever, or porcine reproductive and respiratory syndrome.

Veterinary involvement should not be delayed. Many swine diseases present similarly in the early stages, and empirical treatment without a confirmed diagnosis can mask clinical signs and facilitate spread. The [WOAH Terrestrial Animal Health Code](https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/) requires that suspicion of a listed disease be reported to the national veterinary authority within 24 hours. Producers must have a written agreement with a licensed veterinarian who can perform necropsies, interpret laboratory results, and recommend quarantine or depopulation if necessary. The [PubMed record 37242391](https://pubmed.ncbi.nlm.nih.gov/37242391/) emphasizes that timely veterinary escalation reduces the duration of an outbreak and the volume of carcass disposal required.

If a confirmed zoonotic or highly contagious pathogen is identified, the response plan must include enhanced personal protective equipment for all personnel, restriction of movement between barns, and notification of downstream buyers and suppliers. The [PubMed record 25969585](https://pubmed.ncbi.nlm.nih.gov/25969585/) notes that biosecurity failures during mortality management are a common pathway for disease introduction into contiguous herds. In such situations, the veterinarian should coordinate with state animal health officials to determine the appropriate disposal method,incineration, alkaline hydrolysis, or deep burial,given that composting or rendering may not be permitted for certain high,consequence pathogens.

## Uncertainty and Adaptive Management

Mortality management is subject to uncertainties that require adaptive strategies. The effectiveness of on,site composting varies with ambient temperature, carcass size, and carbon,to,nitrogen ratio. In cold climates, microbial activity slows, and pathogen survival may be prolonged. Similarly, rendering plant availability can be disrupted by epidemics, weather events, or regulatory closures. The [FAO Animal Production and Health](https://www.fao.org/animal-production/en/) documents advise maintaining a contingency stock of lime, sawdust, or other absorbent materials and having a contract with at least two disposal service providers to guard against capacity shortfalls.

Regulatory frameworks differ by jurisdiction and may change in response to emerging diseases. Producers should verify current local, state, and federal requirements for carcass storage time, transport permits, and end,use restrictions on composted material. The [USDA APHIS Livestock and Poultry Disease](https://www.aphis.usda.gov/livestock-poultry-disease) website provides links to state veterinary offices and emergency management agencies. When uncertainty exists regarding the proper disposal of animals that died from an undiagnosed illness, consultation with the state veterinarian is strongly recommended before proceeding with land application or composting.

## Sustainability Considerations

Sustainable deadstock management balances biosecurity, environmental protection, and resource recovery. Composting and rendering convert carcasses into soil amendments or animal feed ingredients, reducing landfill burdens and greenhouse gas emissions compared to incineration. However, these methods are viable only when pathogen inactivation is assured. For operations raising swine under organic or antibiotic,free standards, composting may align with waste reduction goals provided that the final product is applied to non,crop areas or used as a fertilizer with appropriate waiting periods.

Environmental safeguards include siting mortality facilities away from floodplains, installing secondary containment for liquid storage, and testing soil and groundwater periodically if burial or composting is practiced. The [WOAH Terrestrial Animal Health Code](https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/) and [FAO Animal Production and Health](https://www.fao.org/animal-production/en/) publications both stress that sustainability does not override biosecurity. In regions with high water tables or frequent rainfall, alternatives such as incineration or static aerated composting should be prioritized even if they are more costly.

## Frequently Asked Questions

**1. How often should deadstock be picked up by a rendering service?**
Pickup frequency depends on storage capacity, ambient temperature, and disease status. In warm weather, carcasses should be removed within 24 to 48 hours to limit pathogen multiplication and odor. During a disease outbreak, daily pickup may be necessary.

**2. What are the earliest signs of a disease that could cause high mortality?**
Early signs include sudden anorexia, lethargy, huddling, reddened skin, diarrhea, or respiratory distress. A cluster of deaths among grow,finish pigs or multiple age groups is an immediate red flag.

**3. Can composted swine carcasses be used as fertilizer on crop fields?**
In many jurisdictions, composted material can be applied to land providing the composting process reached temperatures sufficient to inactivate pathogens (typically 55°C for 3 consecutive days). Local regulations may require a waiting period before grazing or harvest.

**4. Is it legal to bury dead swine on the farm?**
Burial is regulated by state and local laws. Some areas prohibit it due to groundwater concerns. A permit may be required, and burial must be at least 2 meters deep and away from wells, streams, and property lines.

**5. What personal protective equipment should workers wear when handling deadstock?**
Workers should wear waterproof gloves, rubber boots, coveralls that can be disinfected or laundered, and a face shield or goggles if splashing is possible. For suspected [zoonotic diseases](/knowledge/veterinary-medicine/veterinary-pathology-microbiology/zoonotic-diseases-mechanisms-and-veterinary-public-health), an N95 respirator is recommended.

**6. How long can African swine fever virus survive in buried carcasses?**
Research indicates that African swine fever virus can persist for months to years in buried tissues under cool, moist conditions. Proper containment and lining of burial pits are essential to prevent groundwater contamination and later excavation risks.

**7. What should be included in an emergency deadstock plan?**
The plan should specify designated storage areas, contracts with alternative disposal providers, a communication chain for laboratory testing, a list of personal protective equipment supplies, and procedures for depopulation and decontamination.

**8. How can I reduce the environmental impact of deadstock management?**
Use composting or anaerobic digestion if permitted, minimize transport distances, install leachate collection systems, and consider timing disposal to avoid rain events. Regular maintenance of composting piles ensures aerobic conditions and reduces methane production.

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## Educational Veterinary Notice

This article provides general guidance on swine mortality management and does not replace a site,specific plan developed with your herd veterinarian. Disposal regulations and disease risks change, producers must verify current local requirements and consult a licensed veterinarian when mortality deviates from expected patterns. In the event of a suspected foreign animal disease, immediate notification of the state veterinary authority is mandatory. Proactive deadstock planning, combined with diligent health observation and biosecurity, is the most effective strategy for protecting herd health and the environment.

## Related Farming Guides

- [Pig Farming Breeding Farrowing Nursery Grow Finish Nutrition And Biosecurity](/knowledge/animal-farming/swine/pig-farming-breeding-farrowing-nursery-grow-finish-nutrition-and-biosecurity)
- [Farrowing House Preparation And Sow Care](/knowledge/animal-farming/swine/farrowing-house-preparation-and-sow-care)
- [Newborn Piglet Care During The First 48 Hours](/knowledge/animal-farming/swine/newborn-piglet-care-during-the-first-48-hours)
- [Pig Farm Biosecurity Plan](/knowledge/animal-farming/swine/pig-farm-biosecurity-plan)
- [Production Records For Pig Farms](/knowledge/animal-farming/swine/production-records-for-pig-farms)

## 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

- [FAO Animal Production and Health](https://www.fao.org/animal-production/en/)
- [WOAH Terrestrial Animal Health Code](https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/)
- [USDA APHIS Livestock and Poultry Disease](https://www.aphis.usda.gov/livestock-poultry-disease)
- [Merck Veterinary Manual](https://www.merckvetmanual.com/)
- [USDA National Animal Health Monitoring System](https://www.aphis.usda.gov/livestock-poultry-disease/nahms)

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