A reputable breeder who invests in genetic testing demonstrates they're serious about producing healthier animals—not just maximizing profit. Without this foundational step, you risk bringing home a puppy or kitten carrying hidden hereditary diseases that can cost thousands in vet bills and heartbreak. Genetic testing separates breeders who truly care from those who cut corners.
Why Genetic Testing Matters for Breeders
Genetic testing identifies carriers of inherited conditions before breeding decisions are made. Conditions like hip dysplasia in dogs, polycystic kidney disease in cats, and progressive retinal atrophy across multiple breeds can be screened out entirely when breeders use testing responsibly.
When a breeder tests their breeding stock, they're giving you a written guarantee of sorts—they've verified their animals don't carry common hereditary problems. This translates directly to a healthier pet with fewer emergency vet visits, lower lifetime medical costs, and a longer lifespan.
What Tests Should Breeders Be Running?
The tests required vary dramatically by breed and species. A responsible dog breeder should at minimum have their breeding dogs screened through the Orthopedic Foundation for Animals (OFA) or PennHIP for hip and elbow evaluations. These aren't genetic tests per se, but structural health assessments that prevent degenerative joint disease.
For genetic screening specifically, look for breeders who use services like:
- Embark or Wisdom Panel (whole genome screening for 150+ genetic conditions in dogs)
- UC Davis (breed-specific genetic panels for dogs and other species)
- Optimal Selection (focuses on genetic diversity and disease carriers)
- Feline Genetics Laboratory (for cat breeders screening breeds like Bengals, Maine Coons, and Persians)
- Neogen (DNA testing for cattle, poultry, and exotic animals)
Cat breeders should screen for conditions like hypertrophic cardiomyopathy (HCM) in breeds like Bengals and Maine Coons, and spinal muscular atrophy in certain lines. Small animal breeders of rabbits, guinea pigs, and hedgehogs typically have fewer standardized tests available, but ethical breeders still maintain detailed pedigree records to minimize inbreeding.
What to Look For When Evaluating a Breeder
Ask directly about genetic testing results before committing to a purchase. Legitimate breeders will provide test results unprompted or immediately when asked—they're proud of their health screening. If a breeder deflects, suggests testing "isn't necessary," or claims their line has never had genetic problems (a red flag), move on.
Request to see:
- Original test certificates from the testing organization (not just the breeder's word)
- Testing dates (results older than 2-3 years may need updating)
- Results for both parents, ideally grandparents too
- A written health guarantee backing the testing
- The breeder's plan for animals that test as carriers
Expect transparency about what the testing revealed. Ethical breeders will discuss carriers in their breeding program and explain how they're managing the risk. A carrier isn't a problem—it's knowledge that prevents future litters from inheriting the disease.
Cost and Timeline Considerations
Genetic testing typically costs breeders $200–$500 per dog depending on the scope and breed-specific panels chosen. This investment gets passed along in slightly higher puppy prices, but it's worth it. Puppies from tested parents usually cost $200–$800 more than those from untested lines, which is minimal compared to a $5,000+ diagnosis for hip dysplasia or $3,000 emergency surgery for a preventable heart condition.
Testing adds 2–4 weeks to a breeder's timeline before breeding, so reputable breeders won't have litters immediately available. If a breeder has puppies ready to go within days of your inquiry, they likely didn't test.
Bringing It Together
When you're comparing breeders, genetic testing history should rank high on your evaluation checklist—right alongside health guarantees, references, and living conditions. Platforms like Mercoly let you compare and find trusted pet breeders in one place, making it easier to identify who prioritizes genetic screening and health standards.
Frequently Asked Questions
Q: Does genetic testing guarantee my pet won't get sick? No—it screens for inherited genetic conditions, not acquired illnesses or environmental factors. A tested puppy can still develop cancer or an injury, but you've eliminated many preventable hereditary diseases.
Q: How old should a dog be before genetic testing? Most dogs can be tested at 8 weeks old via DNA swab or saliva sample. Many breeders test puppies before selling them to provide results to new owners.
Q: What should I do if a breeder refuses to share test results? That's a sign to find a different breeder. Reputable breeders are transparent about health screening as standard practice, not an optional favor.
Start your search today by reviewing breeder certifications and genetic testing documentation before making your decision.