I've contacted a few shelters about their adoption policies and all of them in this area require that your current pets have had vaccinations within the past year. They said they would not adopt out their animals under any other conditions. Is this common? I do not believe in yearly vaccinations...every three years I can somewhat deal with, but I feel it is harmful to vaccinate yearly. Since I have never gotten an animal from a shelter, I was curious if this over-vaccination mind-set was common.