How often is too often when it comes to your pet's vaccinations? It's a question more and more pet owners are asking these days. Mounting debate about the need to vaccinate animals annually, along with concerns about a possible link between vaccines and rare cancers, may leave many pet owners confused about how often to visit the vet for vaccinations.

CHARLOTTE, N.C. - Tejal Joshi would do just about anything for her dog. She would pay just about anything, too.

The message on the door makes it clear this is no average institution of higher learning:
- "Please wipe wet and muddy paws."
- Welcome to Canine University.
Inside, a teenager sits on the floor and gently strokes her yellow Lab, Libby. A little boy smooches the nose of his handsome golden retriever, Taylor. And a 9-year-old blonde tries desperately to control her 3-month-old pup, Lucy.