Rabies vaccination requirements for pets vary by country and even by region, but in most places, rabies vaccination is legally mandatory for all dogs, and often strongly recommended — or required — for cats as well. Many governments require proof of vaccination for pet licensing, travel, or entry into public areas. In some regions, unvaccinated pets can be quarantined or euthanized if they bite someone. Generally, the first rabies shot is given at around 3 months of age, followed by boosters every 1 to 3 years, depending on local laws and vaccine type.