How to find a "good vet".

I have read a lot of websites saying find a good vet before you get your rats.
Of course I want to do this, but what is a good vet, how can you tell? Thanks anyway x x

Before I got my rats, I called around local vets and asked what experience they had with pet rats, and if they were happy to handle and treat them. My vet I use said he had 16 years vet experience and 14 of that he had been seeing rats and he had a few regular go-ers with rats too.