I have considered going to a holistic vet over the years and one vet here actually does both conventional medicine and holistic medicine but they are far and I have heard mixed reviews. I ended up switching vets earlier this year to someone who is a traditional hospital but who has an interest in holistic approaches. For me, a conventional vet is needed but I home cook and I've had my battles over the years with dumb dumb vets who had a lot to say about it. I think it is a good option - I might keep a conventional vet too but keep a holistic for some things.
To Joann - here is a website with info on holistic vets and their philosophy
What Is Holistic Medicine?