That's a good, complicated question.
I will offer this, from my experience:
Vets on the recommended lists are not infallible. Some of them (my opinion from experience) shouldn't be practicing.
Never let your guard down with your bully's health. Don't stray from your instinct and a 2nd opinion is always an option (in my case added quite a bit of time to my bully's life).
After an awful experience with a vet, my strategy was to find a smart (Cornell, etc. educated), well trained (abreast of bully ailments and maladies:revealed through inquiry), and most importantly resourceful (knows their limits and has a good relationship with the best specialists).
I was succesful, but think some higher power was looking out for me.