Many dog DNA testing companies claim more than 90% accuracy; these types of tests are never 100% accurate, and there are lots of factors that can influence your pup’s results, including:
Quality of the DNA sample: Contaminated or improperly collected samples can lead to incorrect results. If another pets’ DNA, or food residue in the dog’s mouth, gets on the swab, it could contaminate it.
Breed complexity: Identifying purebred dogs tends to be more accurate than mixed-breed dogs. Some breeds, especially rare or closely related ones, may get skewed results.
The size of the breed database: A testing company with a large database—like hundreds of different breeds—increases the likelihood of correct breed identification.
The technology and methodologies used: Look for a company that uses advanced genetic testing methods—for instance, using many genetic markers. Top-tier companies use tens to hundreds of thousands of genetic markers.
Reputation of testing company: Well-established companies often collaborate with geneticists and vet experts—sometimes partnering with research universities—to ensure scientific credibility.
Keep in mind: Dog DNA test companies pretty consistently conduct new research and customer surveys to improve accuracy and gather new info. So by sharing your experience after testing your pup, you can help improve the knowledge base.