# Rabbit Artificial Insemination Program Planning and Veterinary Coordination


## Key Takeaways

- **Semen Quality Thresholds are Critical:** Minimum acceptable thresholds for rabbit semen include progressive motility >70%, concentration >200 million/mL, and normal morphology >80%. Bucks failing these benchmarks require retesting or veterinary investigation for issues like overcollection, heat stress, or nutritional deficiencies.
- **Optimized Insemination Timing is Paramount:** Insemination must occur 0-4 hours post-ovulation induction (via GnRH or hCG) to align with the natural ovulation window, which follows mating by 10-12 hours.
- **Comprehensive Record Keeping Drives Program Success:** Tracking individual buck and doe performance, semen quality parameters (motility, concentration, morphology), insemination details, and litter outcomes is essential for identifying trends and troubleshooting low conception rates (<60%) or declining litter sizes.
- **Veterinary Coordination is Non-Negotiable:** Establishing a relationship with a rabbit-experienced veterinarian is crucial for developing health protocols, disease surveillance (e.g., serology for *Pasteurella multocida*, *Treponema cuniculi*), semen testing for contamination, and emergency procedure planning.
- **Buck Selection Integrates Multiple Factors:** A practical framework for buck selection involves establishing minimum semen quality thresholds and assigning weighted scores for parameters like motility, concentration, morphology, and genetic merit to prioritize fertility and desired traits.
- **Environmental and Nutritional Factors Impact Fertility:** Maintaining buck housing temperatures below 25°C to prevent heat stress and ensuring a balanced diet with adequate protein (16-18%), zinc, selenium, and vitamin E are vital for optimal semen production and quality.

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Artificial insemination (AI) in [rabbit production](/knowledge/animal-farming/rabbits/rabbit-welfare-and-enrichment-meeting-behavioral-needs-in-production-systems) allows commercial breeders to improve genetic selection, synchronize kindling, and reduce the number of bucks needed on farm. This guide covers the practical steps for planning and executing an AI program, including equipment needs, semen handling, insemination timing, record keeping, and coordination with a veterinarian. The information is intended for rabbit farmers and farm managers who are considering or currently implementing AI to improve production efficiency and genetic outcomes.

## At a Glance: Key Considerations for Rabbit AI Program Planning

| Component | Description | Critical Decision Points |
|-----------|-------------|--------------------------|
| Program Goals | Define genetic improvement targets, production cycle synchronization, and reduction in buck numbers | Select bucks based on desired traits, determine acceptable conception rates |
| Equipment and Supplies | AI guns, catheters, semen collection equipment, extenders, microscopes, liquid nitrogen storage | Source from reputable suppliers, verify compatibility with rabbit anatomy |
| Semen Collection and Handling | Use artificial vagina or electroejaculation, evaluate motility, concentration, and morphology | Establish collection schedule, train personnel in handling and evaluation |
| Insemination Timing | Induce ovulation with GnRH or hCG, inseminate 0-4 hours after induction | Coordinate with doe reproductive status, monitor for optimal timing |
| Record Keeping | Track buck performance, semen quality, insemination dates, conception rates, and litter outcomes | Use standardized forms or software, review data monthly |
| Veterinary Coordination | Establish health protocols, semen testing, disease surveillance, and emergency procedures | Schedule regular veterinary visits, develop written protocols |

## Program Planning and Infrastructure

### Facility and Equipment Requirements

A dedicated AI area should be clean, well-lit, and temperature-controlled. Essential equipment includes an artificial vagina or electroejaculator for semen collection, a microscope with heated stage for semen evaluation, glass slides and coverslips, semen extenders, AI catheters (2-3 French size for rabbits), and a liquid nitrogen tank if freezing semen. The FAO provides general guidance on livestock AI infrastructure, though specific rabbit equipment must be sourced from specialized suppliers. The Merck Veterinary Manual offers information on rabbit reproductive anatomy and physiology relevant to AI procedures.

### Semen Collection and Evaluation

Semen is typically collected using an artificial vagina designed for rabbits. The collection tube should be pre-warmed to 37-40°C. Bucks should be trained to mount a teaser doe or a dummy. Collection frequency should not exceed twice per week to maintain semen quality. After collection, evaluate semen for volume, color, motility (progressive motility above 70% is desirable), concentration (using a hemocytometer or spectrophotometer), and morphology. Abnormalities such as bent tails, proximal droplets, or head defects indicate potential fertility issues. The USDA Agricultural Research Service conducts research on rabbit reproduction and semen quality, which can inform evaluation protocols.

### Semen Processing and Storage

Fresh semen should be used within 2-4 hours of collection if kept at 15-20°C. For longer storage, dilute semen with an appropriate extender (e.g., Tris-based or skim milk-based extenders) and cool slowly to 4-6°C. Extended semen can be stored for 24-48 hours with acceptable fertility. For long-term storage, semen can be frozen using a controlled-rate freezing protocol with cryoprotectants such as glycerol or dimethyl sulfoxide. Frozen semen requires liquid nitrogen storage at -196°C. The FAO Animal Production and Health division provides resources on semen preservation techniques applicable to multiple species.

## Insemination Protocol and Timing

### Inducing Ovulation

Rabbits are induced ovulators, meaning ovulation occurs approximately 10-12 hours after mating. For AI, ovulation must be induced artificially using gonadotropin-releasing hormone (GnRH) or human chorionic gonadotropin (hCG). Administer the induction agent intramuscularly or intravenously according to veterinary instructions. Insemination should occur 0-4 hours after induction to allow sperm to reach the oviduct before ovulation. The Merck Veterinary Manual provides information on rabbit reproductive physiology and hormonal control.

### Insemination Technique

Restrain the doe gently but securely. Insert the AI catheter into the vagina, angling slightly dorsally to avoid the urethral opening. Advance the catheter approximately 10-15 cm until resistance is felt at the cervix. Deposit 0.3-0.5 mL of semen containing 10-20 million motile sperm. Withdraw the catheter slowly. Some protocols recommend a second insemination 4-6 hours later to improve conception rates, though this increases labor and semen use.

### Post-Insemination Management

After insemination, return the doe to her cage and provide normal feed and water. Do not disturb her for at least 2 hours. Monitor for signs of pregnancy (palpation at 10-14 days or ultrasound at 12-14 days). Record insemination date, buck used, semen quality, and any observations. The USDA National Agricultural Library's Animal Health and Welfare resources offer guidance on [rabbit housing](/knowledge/veterinary-medicine/small-mammal-care/rabbit-housing-indoor-vs-outdoor-hutches-and-enrichment) and care during reproduction.

## Records and Measurements

### Essential Records for AI Program Management

Maintain individual records for each buck and doe. For bucks, record collection dates, semen volume, concentration, motility, morphology, and any health issues. For does, record insemination dates, buck used, induction agent and dose, pregnancy check results, kindling date, litter size, and weaning weights. Use a standardized form or software to track these data. Review records monthly to identify trends in conception rates, litter size, and buck performance.

### Key Performance Indicators

Track the following metrics to evaluate AI program success:
- Conception rate: percentage of inseminated does that kindle
- Litter size: number of kits born alive and dead
- Weaning weight: average weight at weaning
- Semen quality: progressive motility, concentration, and morphology over time
- Buck usage: number of inseminations per buck per week

Compare these metrics to farm targets and industry benchmarks. If conception rates fall below 60% or litter sizes decline, investigate potential causes such as semen quality, insemination timing, doe health, or environmental factors.

### Sample Record Keeping Table

| Date | Doe ID | Buck ID | Semen Motility (%) | Induction Agent | Dose (mL) | Pregnancy Check | Kindling Date | Litter Size |
|------|--------|---------|--------------------|-----------------|------------|-----------------|---------------|-------------|
| 2024-01-15 | D001 | B003 | 75 | GnRH | 0.4 | Positive | 2024-02-12 | 8 |
| 2024-01-15 | D002 | B003 | 75 | GnRH | 0.4 | Negative | - | - |
| 2024-01-16 | D003 | B005 | 80 | hCG | 0.5 | Positive | 2024-02-13 | 7 |

## Common Failure Patterns and Troubleshooting

### Low Conception Rates

Low conception rates can result from poor semen quality, incorrect insemination timing, inadequate induction, or doe health issues. Verify semen motility and concentration before each insemination. Ensure induction agent is stored and administered correctly. Check that insemination occurs within the optimal window after induction. Evaluate doe body condition, age, and health status. The Merck Veterinary Manual provides information on rabbit reproductive disorders that may affect fertility.

### Poor Semen Quality

Semen quality can decline due to overcollection, heat stress, nutritional deficiencies, or disease. Reduce collection frequency to twice per week. Maintain ambient temperature below 25°C in the buck housing area. Provide a balanced diet with adequate protein, vitamins, and minerals. Test for common rabbit pathogens such as Pasteurella multocida or Treponema cuniculi if semen quality remains poor.

### Doe Health Issues

Does that fail to conceive or have small litters may have reproductive tract infections, hormonal imbalances, or poor body condition. Conduct regular health checks and consult a veterinarian for diagnostic testing. Ensure does are in good body condition (body condition score 3-4 on a 5-point scale) before insemination. The USDA National Agricultural Library's Animal Health and Welfare resources offer guidance on rabbit health management.

### Equipment and Technique Failures

Common equipment failures include catheter blockage, improper temperature control during semen handling, and microscope calibration issues. Train personnel in proper equipment maintenance and troubleshooting. Replace catheters after each use to prevent cross-contamination. Calibrate microscopes weekly using a stage micrometer. The FAO provides general guidance on equipment maintenance for livestock AI programs.

## Welfare and Safety Context

### Animal Welfare Considerations

AI reduces the stress of natural mating for does that may be injured by aggressive bucks. However, improper handling during AI can cause injury or stress. Train personnel in gentle restraint techniques. Use lubricated catheters to minimize discomfort. Limit the number of insemination attempts per doe to two per estrus cycle. Provide adequate recovery time between inseminations. The FAO emphasizes the importance of animal welfare in livestock production systems.

### Worker Safety

Personnel handling rabbits should wear gloves to prevent zoonotic disease transmission (e.g., ringworm, pasteurellosis). Use proper lifting techniques to avoid back strain when handling heavy does. Ensure the AI area is well-ventilated to reduce ammonia exposure from urine. Have a first aid kit available and train staff in basic first aid.

### Biosecurity

Implement biosecurity protocols to prevent disease introduction. Quarantine new bucks for at least 30 days before introducing them to the breeding herd. Use separate equipment for each animal or disinfect between uses. Restrict visitor access to the AI area. The USDA National Agricultural Library's Animal Health and Welfare resources provide biosecurity guidelines for livestock operations.

## Veterinary Coordination

### Establishing a Veterinary Relationship

Work with a veterinarian experienced in rabbit production. Schedule an initial consultation to review the AI program, discuss health protocols, and establish a written veterinary-client-patient relationship. The veterinarian can provide guidance on induction agents, semen extenders, and disease testing. The FAO Animal Production and Health division emphasizes the importance of veterinary involvement in livestock reproduction programs.

### Health Testing and Disease Surveillance

The veterinarian can develop a health testing protocol for bucks and does. Common tests include serology for Pasteurella multocida, Treponema cuniculi, and Encephalitozoon cuniculi. Semen can be tested for bacterial contamination. Conduct testing annually or when introducing new animals. The Merck Veterinary Manual provides information on rabbit diseases and diagnostic testing.

### Emergency Procedures

Develop written emergency procedures for situations such as anaphylactic reactions to induction agents, uterine prolapse, or severe hemorrhage during AI. Ensure staff are trained in basic emergency response. Have contact information for the veterinarian and nearest veterinary emergency clinic readily available. The USDA National Agricultural Library's Animal Health and Welfare resources offer guidance on emergency planning for livestock operations.

## Professional Escalation Criteria

### When to Consult a Veterinarian

Consult a veterinarian if:
- Conception rates fall below 50% for three consecutive months
- Semen quality declines despite management changes
- Does show signs of reproductive tract infection (e.g., vaginal discharge, swelling)
- Bucks develop testicular abnormalities or refuse to mount
- Unexpected disease outbreaks occur in the breeding herd

### When to Seek Specialist Advice

Consider consulting a rabbit reproduction specialist or extension veterinarian if:
- AI program goals are not being met after six months of implementation
- Genetic improvement targets require advanced techniques such as semen sexing or embryo transfer
- Complex health issues arise that require diagnostic testing beyond routine screening
- Regulatory changes affect AI program requirements

## Semen Quality Assessment and Buck Selection Decision Framework

### Practical Decision Framework for Buck Selection

A structured buck selection framework ensures that only males with optimal fertility contribute to the AI program. The framework should integrate semen quality parameters, genetic merit, and health status into a weighted scoring system. Begin by establishing minimum thresholds for each semen quality parameter based on published standards and farm-specific targets. The Merck Veterinary Manual provides baseline information on rabbit reproductive physiology that informs these thresholds.

**Step 1: Establish Minimum Acceptable Thresholds**

Set minimum values for each semen quality parameter before considering a buck for AI use. These thresholds should be reviewed annually with veterinary input:

- Progressive motility: minimum 70%
- Sperm concentration: minimum 200 million sperm per mL
- Normal morphology: minimum 80% normal spermatozoa
- Volume per ejaculate: minimum 0.5 mL
- Total motile sperm per ejaculate: minimum 100 million

Bucks that fail to meet any single threshold should be retested after 7-14 days. If they fail again, remove them from the breeding program and consult a veterinarian to investigate underlying causes. The USDA Agricultural Research Service conducts research on rabbit semen quality parameters that can inform threshold setting.

**Step 2: Assign Weighted Scores for Selection**

For bucks that meet minimum thresholds, assign weighted scores to prioritize selection decisions. Use the following weighting system based on production goals:

| Parameter | Weight for Genetic Improvement Focus | Weight for Conception Rate Focus |
|-----------|--------------------------------------|----------------------------------|
| Progressive motility | 25% | 35% |
| Sperm concentration | 20% | 25% |
| Normal morphology | 25% | 20% |
| Genetic merit index | 30% | 20% |

Calculate a composite score for each buck by multiplying each parameter score (on a 0-100 scale) by its weight and summing the results. Select bucks with composite scores above 75 for routine AI use. Bucks scoring 60-75 may be used as backups or for specific genetic crosses. Bucks scoring below 60 should be removed from the program.

**Step 3: Implement a Rotation Schedule**

Rotate bucks every 3-4 months to prevent overuse and maintain semen quality. Track the number of collections per buck per week and limit to two collections per week. The FAO provides general guidance on buck management for livestock AI programs, though specific rotation schedules should be tailored to [rabbit production systems](/knowledge/animal-farming/rabbits/rabbit-production-systems-intensive-semi-intensive-extensive).

### Semen Quality Assessment Protocol

**Collection and Initial Evaluation**

Standardize the collection procedure to minimize variability. Use a pre-warmed artificial vagina (37-40°C) and collect into a graduated collection tube. Record the following immediately after collection:

- Volume: measure to the nearest 0.1 mL
- Color: normal is milky white to cream, yellow or red indicates contamination
- Consistency: normal is slightly viscous, watery consistency indicates poor quality

The Merck Veterinary Manual provides information on normal rabbit semen characteristics that can guide initial evaluation.

**Microscopic Evaluation**

Perform microscopic evaluation within 5 minutes of collection to avoid temperature-related damage. Use a phase-contrast microscope with a heated stage set to 37°C. Evaluate the following parameters:

- Progressive motility: estimate the percentage of sperm showing forward movement. Place a drop of undiluted semen on a pre-warmed slide and cover with a coverslip. Count at least 200 sperm in five different fields. Progressive motility above 70% is desirable for AI.
- Sperm concentration: use a hemocytometer or spectrophotometer calibrated for rabbit sperm. Dilute semen 1:100 with a sperm diluent (e.g., 0.9% saline with 0.1% formalin). Count sperm in the central grid of the hemocytometer and calculate concentration using the formula: concentration (sperm/mL) = (count x dilution factor x 10,000) / number of grids counted.
- Morphology: prepare a stained smear using eosin-nigrosin stain or a commercial sperm morphology stain. Count at least 200 sperm and classify abnormalities into head defects (e.g., detached heads, abnormal shape), midpiece defects (e.g., bent midpiece, proximal droplets), and tail defects (e.g., coiled tail, bent tail). Normal morphology should exceed 80%.

The USDA Agricultural Research Service conducts research on rabbit sperm morphology and its relationship to fertility, which can inform evaluation protocols.

**Record Keeping for Semen Quality**

Maintain a semen quality log for each buck with the following fields:

| Date | Buck ID | Volume (mL) | Color | Motility (%) | Concentration (million/mL) | Total Sperm (million) | Normal Morphology (%) | Technician | Notes |
|------|---------|-------------|-------|--------------|----------------------------|-----------------------|------------------------|------------|-------|
| 2024-03-01 | B003 | 0.8 | Cream | 78 | 350 | 280 | 85 | J.Smith | Normal |
| 2024-03-05 | B003 | 0.7 | Cream | 75 | 320 | 224 | 82 | J.Smith | Slight decline |
| 2024-03-08 | B003 | 0.6 | White | 72 | 290 | 174 | 80 | J.Smith | Monitor |

Review this log weekly to identify trends. A decline in motility or concentration over three consecutive collections warrants investigation. The FAO Animal Production and Health division provides resources on record keeping for livestock reproduction programs.

### Troubleshooting Semen Quality Problems

**Common Failure Patterns and Corrective Actions**

| Problem | Possible Causes | Corrective Actions |
|---------|-----------------|-------------------|
| Low motility (<70%) | Overcollection, heat stress, infection, poor nutrition | Reduce collection frequency to once per week, check ambient temperature (<25°C), test for pathogens, review diet |
| Low concentration (<200 million/mL) | Overcollection, testicular degeneration, age | Reduce collection frequency, evaluate buck age (retire bucks over 2 years), consult veterinarian |
| High abnormal morphology (>20%) | Heat stress, nutritional deficiency, genetic factors | Check housing temperature, supplement with vitamin E and selenium, cull bucks with persistent abnormalities |
| Low volume (<0.5 mL) | Incomplete collection, reproductive tract issues | Retrain collection technique, examine buck for reproductive abnormalities |
| Yellow or red color | Urine or blood contamination | Improve collection technique, check for reproductive tract injury |

If corrective actions do not resolve the problem within 2-3 weeks, consult a veterinarian for diagnostic testing. The Merck Veterinary Manual provides information on rabbit reproductive disorders that may affect semen quality.

**Environmental Factors Affecting Semen Quality**

Heat stress is a major cause of reduced semen quality in rabbits. Bucks should be housed in temperature-controlled facilities with ambient temperature maintained below 25°C. Provide adequate ventilation and cooling during hot weather. The USDA National Agricultural Library's Animal Health and Welfare resources offer guidance on environmental management for rabbit production.

Nutrition also plays a critical role in semen quality. Provide a balanced diet with 16-18% crude protein, adequate energy, and supplemental vitamins and minerals. Zinc, selenium, and vitamin E are particularly important for sperm production and function. Consult a nutritionist or veterinarian for specific dietary recommendations.

### Buck Health Monitoring and Veterinary Coordination

**Health Testing Protocol**

Work with a veterinarian to develop a health testing protocol for bucks. Common tests include:

- Serology for Pasteurella multocida, Treponema cuniculi, and Encephalitozoon cuniculi
- Bacterial culture of semen for contamination
- Physical examination for testicular abnormalities, hernia, or other reproductive tract issues

Test new bucks before introducing them to the breeding herd. Retest annually or when health problems arise. The FAO Animal Production and Health division emphasizes the importance of disease surveillance in livestock reproduction programs.

**Veterinary Consultation Criteria**

Consult a veterinarian if:

- Semen quality parameters fall below minimum thresholds for three consecutive collections
- Bucks show signs of reproductive tract infection (e.g., swelling, discharge, pain)
- Bucks refuse to mount or show reduced libido
- Testicular abnormalities are detected on physical examination
- Conception rates decline despite acceptable semen quality

The Merck Veterinary Manual provides information on rabbit diseases and diagnostic testing that can guide veterinary consultation.

### Records and Measurements for Buck Performance

**Essential Records for Each Buck**

Maintain a comprehensive record for each buck that includes:

- Identification (ear tag, tattoo, or microchip)
- Date of birth and source
- Genetic pedigree and selection index
- Health history (vaccinations, treatments, test results)
- Semen collection log (dates, volume, quality parameters)
- AI usage (number of inseminations, conception rates, litter sizes)

Review these records quarterly to identify top-performing bucks and those that should be culled. The USDA Agricultural Research Service conducts research on genetic evaluation in rabbits that can inform record keeping and selection decisions.

**Key Performance Indicators for Bucks**

Track the following metrics for each buck:

- Average progressive motility over the last 10 collections
- Average sperm concentration over the last 10 collections
- Conception rate for does inseminated with his semen
- Average litter size for does inseminated with his semen
- Number of inseminations per month

Compare these metrics to farm targets and industry benchmarks. Bucks with consistently below-average performance should be removed from the program. The FAO provides general guidance on performance monitoring for livestock AI programs.

### Professional Escalation Criteria

**When to Consult a Reproduction Specialist**

Consider consulting a rabbit reproduction specialist or extension veterinarian if:

- Semen quality problems persist despite management changes and veterinary treatment
- Genetic improvement targets require advanced techniques such as semen sexing or embryo transfer
- Complex health issues arise that require diagnostic testing beyond routine screening
- Regulatory changes affect AI program requirements

The USDA National Agricultural Library's Animal Health and Welfare resources offer guidance on finding specialist veterinary services for livestock operations.

## Frequently Asked Questions

### What equipment is essential for starting a rabbit AI program?
Essential equipment includes an artificial vagina or electroejaculator for semen collection, a microscope with heated stage for semen evaluation, AI catheters (2-3 French size), semen extenders, and a liquid nitrogen tank if freezing semen. The FAO provides general guidance on livestock AI infrastructure, though specific rabbit equipment must be sourced from specialized suppliers.

### How often can bucks be collected for semen?
Bucks should not be collected more than twice per week to maintain semen quality. Overcollection can lead to reduced sperm concentration, motility, and fertility. The Merck Veterinary Manual provides information on rabbit reproductive physiology relevant to collection frequency.

### What is the optimal timing for insemination after ovulation induction?
Insemination should occur 0-4 hours after administering GnRH or hCG to induce ovulation. This timing allows sperm to reach the oviduct before ovulation occurs approximately 10-12 hours after induction. The USDA Agricultural Research Service conducts research on rabbit reproduction timing.

### How many sperm are needed per insemination?
A dose of 10-20 million motile sperm in 0.3-0.5 mL of extender is typically used for rabbit AI. Higher sperm numbers may improve conception rates but increase semen use. The FAO Animal Production and Health division provides resources on semen dosage for various species.

### What records should be kept for an AI program?
Maintain individual records for each buck and doe, including collection dates, semen quality parameters, insemination dates, induction agent and dose, pregnancy check results, kindling dates, litter size, and weaning weights. Review records monthly to identify trends and make management decisions.

### How can low conception rates be improved?
Investigate potential causes including poor semen quality, incorrect insemination timing, inadequate induction, doe health issues, or environmental stressors. Verify semen motility and concentration before each insemination. Ensure induction agent is stored and administered correctly. Evaluate doe body condition and health status. The Merck Veterinary Manual provides information on rabbit reproductive disorders.

### What are the welfare benefits of AI compared to natural mating?
AI reduces the risk of injury to does from aggressive bucks during natural mating. It also allows for better genetic selection and reduces the number of bucks needed on farm, which can improve overall herd health management. The FAO emphasizes the importance of animal welfare in livestock production systems.

### When should a veterinarian be consulted for AI program issues?
Consult a veterinarian if conception rates fall below 50% for three consecutive months, semen quality declines despite management changes, does show signs of reproductive tract infection, bucks develop testicular abnormalities, or unexpected disease outbreaks occur. The USDA National Agricultural Library's Animal Health and Welfare resources offer guidance on veterinary consultation.

## Related Farming Guides

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## Related Clinical & Scientific Guides

* [Rabbit Housing for Meat Production: Efficient and Humane Systems](/knowledge/animal-farming/rabbits/rabbit-housing-meat-production-efficient-humane)
* [Raising Meat Rabbits From Weaning to Processing Weight](/knowledge/animal-farming/rabbits/raising-meat-rabbits-from-weaning-to-processing-weight)
* [Rabbit Cage Sizing and Space Requirements by Breed and Stage](/knowledge/animal-farming/rabbits/rabbit-cage-sizing-space-requirements-breed-stage)


## References and Further Reading

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- __MASK_9__. Food and Agriculture Organization of the United Nations.
- __MASK_10__. USDA National Agricultural Library.

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