i have not been able to find a good holistic vet in my area so cant comment directly, but i do only see naturopathic and holistic dr's myself. if the vets are anything like them, i would highly recomend you at least make an appointment to see what the one close to you is like. unlike regular MD's, naturopaths and wholistic practitioners see the person (and im supposing pup) in whole instead of focusing on the problem. So instead of pushing pills and medication the mask the problem, they will likely look into the whole pup to see what could be causeing the problem in the first place and help to heal the cause instead of just ease the symptoms with drugs.
just like anything though, do your research and find someone you are comfortable with obviously. just like vets, its hard to find a good, knowledgable holistic practitioner. but if you do, i have a feeling it will be well worth while!
(if anyone can recommend one in toronto, ontario i would be greatful also!)
Good luck and let us know what your experience is if you decide to see one