We love our vet too. It is worth the research to find one that takes chickens so when the time comes for an emergency (we had 4 this past year) the vet choice has already been made. Chickens may be utility for some owners but they are still a domestic animal and deserve the same health care as any dog or cat. Plus like you say it's peace of mind having a correct diagnosis instead of guessing and trying to self-treat for the wrong thing.Here's a video of Pepper getting pet!
She had a trip to the vet recently when I was worried she might have sour crop, but I was just worrying too much. She was just drinking lots of water! She was given a clean bill of health, along with lots of compliments. The vet said she's one of the best behaved chickens he's gotten to see. No complaints about her health or care routine! It was worth the trip, it's better that she's not sick and I worry about doing right by her a lot. It's nice to have a poultry health professional tell me my chicken isn't about to explode at any moment.