Most of the vet schools in the US are now teaching this protocol. It's from Dr. Jean Dodds. (google the name for lots of links) It's what we use--basically 3 basic first shots spaced out with rabies at about 16 weeks, then a booster at one year and never again. Most my critters arrive as adults with no history so I treat them as if they were babies for the first set of shots.

I do 3 year rabies shots because the city I live in says I have to for my dogs, except my old timers. My vet writes me a letter for any dogs over 7 years old. They don't get any vaccinations anymore. There also hasn't been a case of rabies in my area in over 60 years. I don't do rabies at all for my cats.

Vaccines are a huge money maker for vets. My vet agrued with me a for a long time about changing our schedule for vaccines. Now he's on board and no longer recommends annual shots to any of his clients. He does see my critters all at least once a year--the annual check up part is still a good idea. My vet comes to my house once a year--so much easier than taking them all to him! He also knows me well enough to know that if I am even a little concerned, I'll be in his office.