Veterinarians are required by law to send information on all dogs vaccinated for rabies to the State, which in turn shares the information with towns for collection of licensing fees. Dog license fees provide the majority of funding for the State’s Animal Welfare Program. The cost to license a spayed/neutered dog is $7 and $12 for an unaltered dog. The fine for having an unlicensed dog can range from $25 to $100.