Re: Anal Fistula
Yeah, they are painful for the dog, sometimes severely so.
The Derm we see said about half her dogs with fistulas get better without cyslosporin. Some require antibiotics, some an anti-fungal, and mos all a diet change to some new single protein, single carb food.
I have to agree with the others and perhaps say it a bit stronger. In this area, your vet is pretty lame, and is doing your dog no favors.
If they out of control, this can be fatal. It can lead to all sorts of problems that interfere with digestion, elimination, and mobility.