Annual Immunization for Pets "Whether you live in the city, suburbs, or country, your cat or dog should be given annual booster shots against the most common feline and canine diseases." I've noticed in my super effective online research that this subject is a little bit controversial. Some vets say yes an annual booster is necessary. Some vets say maybe not. Humans need vaccines. (omg don't @ me) Pets need vaccines too. BUT Like humans may only need a vaccine once in their lifetime. Pets also only need certain vaccines once in their lifetime. It is important to keep up with your pets shot record so that they don't receive any unnecessary shots. Certain boosters are required for your pet if you plan on boarding them or send them to a doggie daycare. Boosters are different than the initial vaccine. Humans get booster shots as well! There is some controversy that annual boosters are unnecessary. The problem ...