We adopted a dog at the age of two. Our vet said it was a mix of an Australian Shepherd and Border Collie, which we've told everyone. Based on markings, I think it's likely. I am wondering, however, if there are any tests or other ways to know the mix of a dog if you don't know the specific parentage.
Does each dog breed have specific genetic markers that can be used to identify the breed? If so, has a dog breed test been developed or is there no commercial demand for such a test?