Vaccination series are vital for the health of puppies and kittens. Young animals are protected by antibodies in their mother’s milk. However, as they are weaned from this milk, they become more vulnerable to infection.
It is very common for puppies and kittens to receive vaccines in a strictly scheduled series. This is important because the young immune systems of these animals are not mature enough to combat the diseases they may come in contact with. This leaves puppies and kittens susceptible to life-threatening illnesses early on in their lives.