Why do puppies and kittens require a series of vaccinations?
Very young puppies and kittens are highly susceptible to infectious diseases. This is especially true as the natural immunity provided in their mothers’ milk gradually wears off. To keep gaps in protection as narrow as possible and to provide optimal protection against disease for the first few months of life, a series of vaccinations are scheduled, usually 3-4 weeks apart. For most puppies and kittens, the final vaccination in the series is administered when they are 12 to 16 weeks old.
