08/08/2026
We often get asked why we boost puppy and kitten vaccines the way we do, and why so many vaccines are recommended. This is a favorite question of ours! Immune systems are complex. Here is a helpful explanation. Happy Saturday! 🐶☀️🐱
Puppy vaccination timing can look straightforward on paper, but maternally derived antibodies add an important layer of complexity.
For the DA2PP series, AAHA recommends beginning vaccination at 6–8 weeks of age and administering subsequent doses 2–4 weeks apart, with the final dose given after 16 weeks of age.
Those early maternal antibodies help protect puppies, but they can also interfere with the response to distemper and parvovirus vaccines, which is why timing across the series matters.
This graphic focuses on DA2PP. For complete puppy vaccination recommendations, including rabies and leptospirosis, review the AAHA Canine Vaccination Guidelines: https://hubs.li/Q04rF_GH0