You are far more likely to have a husky/shepherd mix than a wolf cross. Your vet, if he has offered a test to show if your dog has any wolf blood in it, is trying to rip you off. There is no test to determine wolf genes in the domestic dog. This is why so many domestic dogs can be passed off as wolfdogs and so many prople are making money out of it. It is also why nearly everyone has a 75% or higher wolfdog - it is what they are told so they part with their money and there is no way to check up on the claim. Most people you will hear saying how easy and biddable their wolfdogs are have domestic dogs that last saw wolf blood thousands of years ago. Sadly many of them will then aquire a real wolf mix with no idea of the behaviour or psychology of these animals. They will treat it as though it were a dog and the consequences can be tragic for everyone involved, not least the animal.