As mentioned, don't be scared to switch vets. When it comes to your pups health, you want to make sure he's in good hands and will get the attention he needs when he needs it.
We have switched vets twice so far. My girlfriend doesn't like the idea of it cause you would rather the dog become comfortable with one vet, but I tell her the same thing. If we have to question the vet or if their hours don't fit our schedule, there's nothing wrong with changing.
If you know any fellow dog owners, ask who they use. If there's a dog park in your area and you take your dog there, that's a good place to start. Just be aware, everybody knows "the best vet". So take names and do some research online. Find out where they went to school, if they are continuing their education, whether they belong to any organizations or boards, and things like that.
Our vet now has all sorts of animals from horses and lamas to dogs, so we feel like he can relate to how we feel when JJ is sick being he's been there before. The specialist we went to for JJ's eye just happened to have 2 Golden's of his own. Number 7 and 8 for him. We don't pick a vet based on whether or not they have dogs, of course, but it just feels like they can understand more sometimes. At the end of the day though, you want to make sure they are qualified, well educated, and will to work with you and your dog to fix whatever the problem may be, pets at home or not.