When searching for a new puppy, most people focus on finding the perfect breed, temperament, and appearance. But there’s one factor that’s more important than all others: health testing. Behind every healthy, happy puppy stands a breeder who understands that responsible dog breeders prioritize long-term health over short-term profits.
In this post, we’ll explore what health testing involves, why it’s crucial, and how reputable breeders use tools like DNA testing and OFA certifications to prevent the spread of hereditary diseases. Whether you’re a first-time dog owner or a seasoned pet parent, understanding these practices will help you make an informed choice—and protect the wellbeing of your future companion.
What Sets Responsible Dog Breeders Apart?
Unlike backyard breeders or puppy mills, responsible dog breeders follow a code of ethics that revolves around health, temperament, and genetic integrity. These breeders are passionate about their dogs and committed to the long-term welfare of the puppies they produce.
Responsible dog breeders:
- Perform genetic and orthopedic health screenings
- Maintain detailed breeding records
- Avoid inbreeding or high-risk pairings
- Provide veterinary care, socialization, and early development
- Offer lifetime support to puppy buyers
At the core of all these practices is health testing—a safeguard against heartbreak, costly vet bills, and preventable suffering.
Why Is Health Testing So Important?
Many dog breeds are predisposed to inherited diseases that may not be obvious at birth but manifest later in life. These can include:
- Hip dysplasia
- Degenerative eye conditions
- Heart disease
- Seizure disorders
- Genetic skin issues
- Allergies and autoimmune disorders
Health testing allows breeders to identify carriers of harmful genes and avoid breeding dogs that are likely to pass on genetic conditions.
Without testing, puppies may be born with unseen health problems that can drastically shorten their lifespan or compromise their quality of life. Responsible dog breeders take every step to prevent this from happening.
DNA Testing: The First Line of Defense
DNA testing is a powerful tool that allows breeders to screen dogs for a wide range of inherited conditions. These tests analyze the dog’s genetic code and identify mutations linked to disease.
What DNA testing can detect:
- Carriers of inherited diseases (e.g., PRA, DM, EIC)
- Traits like coat color, shedding level, and size
- Parentage and lineage confirmation
- Breed composition (helpful in doodles and mixed breeds)
Common DNA tests used by responsible breeders:
- Progressive Retinal Atrophy (PRA) – causes blindness in many breeds
- Degenerative Myelopathy (DM) – a neurological disease similar to ALS
- Exercise-Induced Collapse (EIC) – found in breeds like Labrador Retrievers
- von Willebrand’s Disease – a bleeding disorder common in Dobermans and others
To explore a comprehensive list of canine genetic tests, visit Embark Veterinary — a leading provider of dog DNA testing kits for breeders and pet owners.
Breeders use DNA test results to ensure that carriers are only bred to clear dogs, thereby reducing the risk of passing on the disease while preserving genetic diversity.
OFA Certifications: Orthopedic & Physical Health Matters
While DNA testing looks at genetic conditions, other vital issues—like joint, heart, and eye health—must be evaluated through physical examinations and radiographic screenings. That’s where the Orthopedic Foundation for Animals (OFA) comes in.
The OFA is a nonprofit organization that works with veterinary specialists to assess dogs for a wide range of physical conditions, helping breeders make informed choices.
Common OFA certifications include:
- Hip Dysplasia – Assessed via X-rays graded from Excellent to Severe
- Elbow Dysplasia
- Cardiac Exams – For breed-specific heart conditions
- Eye Exams (CAER) – Conducted by veterinary ophthalmologists
- Patellar Luxation – Common in small breeds
Learn more about OFA screenings and their breed-specific guidelines at OFA.org.
A breeder whose dogs carry OFA clearances has taken proactive steps to reduce the risk of painful orthopedic conditions and expensive treatments in future generations.
Hereditary Diseases and Why They Matter
Let’s take a closer look at a few diseases that responsible dog breeders work hard to eliminate through testing:
1. Hip Dysplasia
A malformed hip joint leads to arthritis, pain, and mobility issues. It’s common in large breeds but can affect small dogs too. OFA or PennHIP certification helps detect and avoid passing this trait along.
2. Progressive Retinal Atrophy (PRA)
This degenerative eye disorder leads to blindness. It’s genetic and incurable, but entirely avoidable through DNA screening and careful pairings.
3. Mitral Valve Disease (MVD)
Particularly common in Cavalier King Charles Spaniels, this heart condition can be detected early through cardiac exams and auscultation.
4. Degenerative Myelopathy (DM)
A progressive spinal cord disease, especially in breeds like the German Shepherd and Boxer. Dogs can live symptom-free if they’re not bred with other carriers.
Responsible dog breeders test for these and other conditions based on the breed’s risk profile. They don’t guess—they test.
How Testing Impacts Puppy Buyers
As a puppy buyer, choosing a breeder who conducts health testing gives you peace of mind and long-term security. Here’s why:
- Lower veterinary costs over the dog’s lifetime
- Improved temperament and behavior (many health issues can cause stress)
- Longer lifespan and better quality of life
- Fewer surprises and less emotional heartache
Breeders who test their dogs provide clear documentation, often including:
- Copies of DNA test results
- OFA or PennHIP certificates
- A health guarantee or contract
- Vet records for vaccinations and deworming
This transparency is a hallmark of responsible dog breeders and a sign you’re working with someone who truly cares.
Red Flags: Breeders Who Don’t Test
Unfortunately, not all breeders uphold high standards. If a breeder cannot or will not provide test results, it’s time to walk away.
Warning signs:
- “The parents are healthy so we didn’t test.”
- “We’ve never had problems before.”
- “You’re not supposed to ask that.”
- Puppies are sold without contracts or guarantees
These are red flags that the breeder may not be committed to responsible, ethical practices. Responsible dog breederswelcome questions and often include test results on their websites or social media.
Breeding Smart: The Role of Carrier Dogs
One common misunderstanding is that carrier dogs must be removed from breeding programs. That’s not always true—if done ethically.
Carriers of a genetic condition can still be bred to clear dogs, producing healthy puppies that won’t be affected by the disease.
This helps preserve valuable traits and genetic diversity, especially in rare or developing breeds.
Responsible breeders work with:
- Geneticists
- Veterinarians
- Breed clubs
…to ensure that each mating improves the line rather than jeopardizing future generations.
How to Verify a Breeder’s Health Testing
Before purchasing a puppy, ask for the following:
- DNA Test Reports – From reputable labs (Embark, Paw Print Genetics, etc.)
- OFA Results or Certificates – Can be verified through OFA’s public database
- Puppy Contract – With health guarantees and spay/neuter clauses
- Veterinary Records – Including vaccinations, microchips, and deworming
If a breeder cannot provide these, they are not following the practices of responsible dog breeders.
Why This Matters More Than Ever
With the rise of online puppy sales and demand for designer breeds, unethical breeding is also on the rise. Puppy mills and backyard breeders often cut corners, producing sickly or unstable dogs without accountability.
By educating yourself and supporting responsible dog breeders, you’re:
- Promoting ethical, humane treatment of dogs
- Helping prevent suffering and abandonment
- Contributing to the long-term health of beloved breeds
Conclusion: The Future Belongs to Responsible Dog Breeders
Choosing a healthy puppy starts with choosing a breeder who puts health first. Through tools like DNA testing, OFA certifications, and informed pairings, responsible dog breeders are leading the way in ethical, sustainable breeding practices.
If you’re considering adding a puppy to your family, ask questions, request proof, and support breeders who invest in science, transparency, and the lifelong welfare of their dogs.
Remember: A healthy puppy doesn’t start at 8 weeks old—it starts with a breeder who cares enough to test.
External Links Summary:
- Embark Dog DNA Testing – Learn about available genetic health tests
- Orthopedic Foundation for Animals (OFA) – Verify certifications and explore breed-specific health testing
- Good Dog Breeder Guide – Tips for evaluating reputable breeders