Will Falconer, DVM Moderator
Inherited chronic disease, possibly, a not uncommon cause of illness. Well worth interviewing the vet you're considering paying, right? Vaccination requirements to care for a sick animal? Immediately move on. That's called malpractice, by the way.
Best bet: a homeopathic vet. I've got a "vetted" list of them on my blog post about metronidazole.