Many dogs and cats are over vaccinated says Ron Schultz

Thanks to Wisconsin Professor Ron Schultz and others, RI now requires rabies shots every three years rather than every year. This also applies for parvo, adenovirus and many other vaccines. This is GOOD news for dogs and their owners, and less so for VETS who make a large percentage of their income from annual vaccinations.
For 30 years, Schultz has been examining the need to vaccinate animals so often and for so many diseases. "In the 1970s, I started thinking about our immune response to pathogens and how similar it is in other animals," says Schultz. "That's when I started to question veterinary vaccination practices."
http://www.news.wisc.edu/releases/8413.html