It is common enought that Vet economics had an article written by a conventional vet who had tried everything 'typical' to treat urinary incontinance in an older, but not ancient, dog. She was to the point of deciding whether or not to euthanize (young kids in the home, infant, angry husband, etc.) Then a fellow vet suggested she visit a vet accupuncturist, and there were improvements within 2 weeks and the dog was improved enough that euth went off the table. The article was written several years after the inital treatment and was suppose to be about haing sympathy for owners facing tough decisions that are viewed as 'convenience' but to me, it was more about tryng different options.
I have attended seminars on accupuncture here, including wetlabs, and every year a group of sudents head to china for a short cours in accupuncture. I currrently perform accupuncture on 2 of my dogs regularly (based on guidance from a vet on our staff) and I have seen improvements. I am using it as part of allergy management in one dog (also on allergy shots) and not sure how much it is helping him (husband who visits on weekends only and didn't know I was doing it has seen improvements, but I am less sure on him) and the other has anxiety issues outside of the house (in cars, on walks, at vets, at school, etc) and the imrpovement in him is drastic. IE we go from a dog that whines, sways on his feet, paces, shivers, etc to a dog who is mellowed out, alert but not panting, laying on his hip. For all know, the needles just distract him, but with those results, I don't really care about the 'why' as much as the 'does'...and the affect of having calm experiences in those environmets builds up positive associations, improving his next encounter with or without needles.
We have lectures, including in a careers class, about alternative meds, so there doesn't seem to be a huge stigma attached here (and people who think it is worthless don't speak out much.) As Oliveoyl mentioned, we have a very active holistic club.
I have mixed feelings on somethings, but I also believe a lot of health is how we handle life, so in most cases I wouldn't object to trying these things while continueing to monitor the patient.
As for vax, my understanding is that protocols have changed alot and many vax are on puppy + 1yr then 3yr cycles now. I do get nervous when I meet anti-vax folks (I do know folks who don't plan to do any vax at all, including rabies, ever.)