Canine Health Screening

Introduction

Health screenings are essential tools for responsible dog breeders, owners, and veterinarians to ensure the long-term well-being of dogs. Several organizations provide genetic and orthopedic testing to identify hereditary diseases that can be passed down through generations. This report focuses on Orthopedic Foundation for Animals (OFA), American Kennel Club (AKC), and PennHIP—how they function, how to use their resources, and additional references for screening canine health concerns.

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1. The Orthopedic Foundation for Animals (OFA)

Website: www.ofa.org

Purpose and Function

The Orthopedic Foundation for Animals (OFA) is a nonprofit organization that maintains a vast database of genetic and orthopedic health test results for dogs. Established in 1966, its primary goal is to reduce the prevalence of inherited diseases in purebred and mixed-breed dogs.

How to Use OFA for Health Screening

OFA provides detailed information on health screenings for numerous canine conditions. The process generally follows these steps:

1. Search for a Dog’s Health Record
   • Go to the OFA database (www.ofa.org) and use the public search tool.
   • Enter the dog’s registered name, registration number, or breed.
   • Review available health test results, including hip dysplasia, elbow dysplasia, cardiac disease, thyroid conditions, and more.
   Example: A search for a Golden Retriever might return results on hip and elbow scores, cardiac evaluations, and genetic screenings for progressive retinal atrophy (PRA).
2. Understanding OFA Hip Scores
   OFA grades hip joint health on a seven-tier scale:
   • Excellent, Good, Fair → Acceptable breeding quality.
   • Borderline → Requires re-evaluation.
   • Mild, Moderate, Severe Dysplasia → Indicates hip dysplasia, unsuitable for breeding.
   Example: A Labrador Retriever with a Good OFA hip score is likely at lower risk for hip dysplasia, while a dog with a Moderate Dysplasia rating is at high risk of arthritis later in life.
3. Checking Breed-Specific Health Testing Recommendations
   • The OFA provides CHIC (Canine Health Information Center) certifications for dogs that have completed all recommended breed-specific tests.
   • Breeders should use CHIC numbers to verify that a dog has undergone necessary screenings.
   Example: The CHIC requirement for a German Shepherd Dog includes hips, elbows, cardiac, and degenerative myelopathy (DM) testing (OFA, 2024).

Limitations of OFA

• OFA hip evaluations are subjective and rely on radiographic (X-ray) interpretation.
• Certification requires dogs to be two years old for final hip scores.
• Some genetic conditions may not be covered in OFA’s database unless the breeder submits test results.

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2. The American Kennel Club (AKC) Canine Health Resources

Website: www.akc.org

Purpose and Function

The American Kennel Club (AKC) is the primary registry for purebred dogs in the United States. While its primary focus is on breed standards and conformation, AKC offers health tracking programs and DNA testing.

How to Use AKC for Health Screening

1. Search the AKC Marketplace
   • Reputable breeders list their dogs on the AKC Marketplace with health testing information.
   • Potential buyers can verify whether a breeder follows AKC-recommended health testing.
   Example: A breeder selling Siberian Huskies might list OFA hip certification and CERF eye exams in their puppy listing.
2. Access the AKC Canine Health Foundation (CHF)
   • AKC CHF funds canine genetic research and provides resources on health conditions for each breed.
   • The Parent Club Recommended Health Testing list helps breeders understand necessary genetic tests.
   Example: The Bulldog Club of America recommends tracheal hypoplasia and BOAS (Brachycephalic Obstructive Airway Syndrome) screening (AKC, 2024).
3. Enroll in AKC DNA & Health Testing
   • AKC offers parentage verification through DNA testing.
   • Limited health screenings are available for common genetic diseases.

Limitations of AKC

• AKC does not require health testing for registration, meaning not all AKC dogs are health-screened.
• The AKC database does not provide detailed medical records like OFA.

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3. PennHIP (University of Pennsylvania Hip Improvement Program)

Website: www.pennhip.org

Purpose and Function

PennHIP is a scientific method of hip evaluation that provides a quantitative measurement of hip joint laxity (looseness), which is a predictor of hip dysplasia.

How to Use PennHIP for Health Screening

1. Find a Certified PennHIP Veterinarian
   • Only licensed veterinarians trained in PennHIP radiography can perform this test.
   • A directory of PennHIP-certified veterinarians is available on their website.
2. Schedule a PennHIP Evaluation
   • Dogs can be screened as early as 16 weeks old, making PennHIP an earlier predictor of hip dysplasia compared to OFA.
   • Three X-ray views are taken to measure Distraction Index (DI), which quantifies hip looseness.
   Example: A Labrador Retriever with a DI of 0.80 has very loose hips and is at high risk for hip dysplasia, while a DI of 0.30 is considered excellent.
3. Compare to Breed-Specific Data
   • PennHIP provides percentile rankings comparing an individual dog’s hip laxity to others in the breed.
   Example: A German Shepherd with a DI in the 90th percentile has better-than-average hip structure compared to other German Shepherds.

Limitations of PennHIP

• Requires sedation for accurate imaging.
• Limited public access to PennHIP scores unless the breeder shares them.

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Other Resources for Canine Health Testing

1. Embark Veterinary DNA Testing (www.embarkvet.com)
   • Screens for 200+ genetic diseases, including MDR1, DM, and PRA.
2. Canine Eye Registry Foundation (CERF) (www.vmdb.org)
   • Offers eye disease screening for inherited ocular conditions.
3. The Kennel Club (UK) Mate Select Program (www.thekennelclub.org.uk)
   • Provides genetic diversity analysis for breeding dogs.

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Conclusion

Utilizing OFA, AKC, and PennHIP provides critical health data for breeders and dog owners. OFA is ideal for comprehensive orthopedic and genetic screening, PennHIP offers an earlier hip dysplasia predictor, and AKC provides breed-specific health resources. Combining these tools ensures informed breeding decisions and better health outcomes for future generations of dogs.

Final Recommendation: Always cross-check multiple sources before selecting a breeding pair or purchasing a dog to avoid genetic health problems.