Health Tests for Dog Breeders

Health testing is the dividing line between a breeder who is genuinely invested in a breed's future and one who is simply producing puppies. When a buyer searches for a puppy, they increasingly understand that health clearances on both parents are a baseline requirement — not a bonus. That means the breeder who tests and documents results has a decisive advantage in a competitive marketplace.

But testing without interpretation is just paperwork. The real value comes from understanding which tests apply to your breed, how to read the results, and how to use them in pairing decisions. This guide walks through the entire process: the rationale behind testing, the specific categories of screenings, how certifications like OFA and CHIC work, and the mistakes that undermine even well-intentioned breeding programs.

If you are refining an existing program, revisit the fundamentals in our ethical breeding practices guide and cross-reference with health testing for dog breeders. The more rigorously you document your process, the more confidence you project to buyers and the healthier your litters will be.

Why Health Testing Matters for Breeding Programs

Genetic conditions are not rare edge cases. Hip dysplasia affects a meaningful percentage of many large and medium breeds. Inherited eye conditions appear across dozens of breeds. Cardiac diseases like dilated cardiomyopathy have devastated certain lines within just a few generations. Without screening, these conditions are invisible until a puppy develops them — long after the breeding pair has produced multiple litters.

Health testing provides three concrete benefits. First, it identifies dogs that should not be bred, removing affected individuals from the gene pool. Second, it identifies carriers of recessive conditions, allowing breeders to pair carriers with clear dogs and preserve desirable genetics without producing affected offspring. Third, it creates a paper trail that buyers can verify independently, which is increasingly the expectation rather than the exception.

Buyers who research carefully will ask for OFA numbers, CHIC certifications, and DNA clearances before placing a deposit. Breeders who cannot produce them lose sales to those who can. The commercial argument alone justifies testing, but the ethical argument is stronger: breeders create lives, and those lives carry the health consequences of breeding decisions.

Core Health Tests by Category

Health screenings fall into several distinct categories, each serving a different purpose. Understanding what each category evaluates prevents confusion between, for example, a phenotypic evaluation (like a hip radiograph) and a genotypic test (like a DNA marker test).

For a deeper breakdown of specific conditions and their inheritance patterns, see our guide to health testing dog breeds and the broader overview of genetic testing for dog breeds.

Breed-Specific Testing Protocols

There is no universal testing panel. Each breed has a documented set of conditions that the parent club's health committee recommends or requires. Following your breed's protocol is not optional if you intend to register with CHIC or be considered a reputable dog breeder.

Example Protocols by Breed Category

Breed clubs maintain the authoritative lists. For example, the parent club for Great Danes specifies cardiac and orthopedic requirements — details are covered in our Great Dane breeder resource. Likewise, breeds prone to hip issues benefit from reviewing hip dysplasia in dogs before selecting breeding stock.

DNA Testing for Breeders

DNA testing has transformed breeding decisions. A test that once required a blood draw and weeks of laboratory time now takes a cheek swab and a few days. The result is a clear classification that guides pairing decisions with precision.

Certifications: OFA, CHIC & PennHIP

Certifications turn test results into verifiable credentials. Buyers can look up OFA numbers and CHIC records online, confirming that a breeder's claims are accurate. This transparency is a major trust factor.

OFA (Orthopedic Foundation for Animals)

OFA maintains databases for hip and elbow evaluations, cardiac certifications, thyroid panels, patella evaluations, and DNA test results. Hips are graded Excellent, Good, Fair, Borderline, Mild, Moderate, or Severe. Only Excellent, Good, or Fair are considered passing grades for breeding purposes. OFA numbers are permanent and searchable.

CHIC (Canine Health Information Center)

CHIC is the coordinating body that defines breed-specific testing requirements. When a dog completes every required test for its breed, CHIC issues a CHIC number. This number is the single most efficient credential a breeder can present — it signals that the dog has met the standardized health protocol for its breed.

PennHIP

PennHIP is an alternative to OFA hip evaluation that uses a distraction index to measure joint laxity. It can be performed as early as 16 weeks, allowing earlier selection of breeding stock. PennHIP results are expressed as a percentile ranking within the breed — lower is better.

When to Test Each Breeding Dog

Timing matters because some evaluations cannot be performed accurately on immature dogs. Hip and elbow radiographs require the joints to be fully developed, which is why OFA accepts them at 24 months of age for final certification. Testing earlier produces unreliable results.

1. DNA tests (any age): Cheek swabs can be collected from puppies as young as a few weeks. Results are final and unaffected by age.
2. Patella evaluations (12+ months): Can be performed by any veterinarian and submitted to OFA for certification.
3. Eye exams (annual): CAER exams should be current within 12 months of breeding. Puppies can be screened but final breeding clearances apply to adults.
4. Cardiac evaluations (12-24 months): Auscultation by a cardiologist or experienced veterinarian, with OFA certification available.
5. Hip and elbow radiographs (24+ months): OFA requires the dog to be at least 24 months for final hip certification. PennHIP can be performed earlier at 16 weeks.
6. Thyroid panels (24+ months): Complete thyroid panels submitted to OFA for certification.

Plan testing schedules around breeding cycles. A female intended for breeding at age two should complete all clearances before her first breeding. Males can be tested similarly before their first stud service. Retesting is required for annual exams like eyes and cardiac evaluations. Additional timing guidance is available in the health testing for dog breeders resource.

Reading & Interpreting Results

Interpreting results correctly is where many breeding programs go astray. A passing grade on one test does not mean the dog is free of all genetic concerns. Each test must be read in context.

Orthopedic Grades

OFA hip grades range from Excellent to Severe. Excellent and Good are the strongest results; Fair is acceptable but indicates mild laxity. Borderline results are ambiguous and should be interpreted cautiously. Mild, Moderate, and Severe are dysplastic — the dog should not be bred. Elbows are graded Normal or Dysplastic; Normal is required for breeding.

DNA Classifications

A Clear result means the dog has no copies of the mutation. A Carrier result means the dog has one copy — breeders can pair carriers with clear dogs. An Affected result means the dog has two copies and should not be bred for that condition. Always document DNA results in writing and submit them to OFA for public verification.

Cardiac & Eye Grades

Cardiac certifications are usually Normal or Abnormal. Eye exams list specific findings; some findings are breed-appropriate and not disqualifying, while others are. Consult your breed's health committee to know which findings are acceptable for breeding.

Using Test Data in Pairing Decisions

The goal is not to breed only perfect dogs — such dogs are rare and invaluable. The goal is to pair dogs in a way that minimizes risk while preserving desirable traits. This requires balancing test results against conformation, temperament, and pedigree diversity.

• Never pair two carriers of the same recessive condition. This is the cardinal rule. Pair a carrier with a clear dog to avoid affected offspring while preserving the desirable lineage.
• Complement strengths and weaknesses. If one dog has a Fair hip grade, pair with a dog with Excellent hips and a strong ancestral record. Stacking favorable pedigrees reduces risk but does not eliminate it.
• Consider coefficient of inbreeding. High COI increases the probability of recessive conditions surfacing. Use outcrossing strategically to maintain genetic diversity while preserving breed type.
• Document everything. Keep records of all test results, pairings, and outcomes. Over time, your records become a proprietary dataset that informs future decisions and demonstrates professionalism to buyers.

The pairing decision is also where breeder contract terms should be finalized — health guarantees should reference the testing performed on both parents.

Common Testing Mistakes Breeders Make

• Testing only one parent. Both parents must be tested. A clear sire paired with an untested dam provides no assurance for the litter.
• Testing too early. Hip radiographs taken before 24 months produce unreliable OFA results. Wait for maturity before final certification.
• Misunderstanding carrier status. Carriers are not affected and can be bred responsibly when paired with clear dogs. Excluding all carriers from breeding unnecessarily shrinks the gene pool.
• Ignoring annual retesting. Eye and cardiac certifications must be current. A clearance from three years ago may no longer be valid for a breeding planned today.
• Not submitting results to OFA. In-house test results are not verifiable by buyers. Submit all results for certification to maximize credibility.
• Relying on DNA alone. DNA tests cannot detect multifactorial conditions. Combine them with orthopedic, cardiac, and eye evaluations.
• Hiding unfavorable results. Transparency builds long-term trust. Concealing a Fair hip grade to close a sale destroys reputation when the buyer later checks the OFA database.

For guidance on screening buyers and matching puppies to homes, see our puppy visit checklist and how to choose a puppy from a breeder.

Frequently Asked Questions