The Complete Guide to Pet Vaccinations

Vaccination is one of the greatest achievements in veterinary medicine. With conflicting information online, many pet owners are confused about what their pet really needs.

How Vaccines Work

Vaccines expose the immune system to a harmless version of a pathogen. The immune system produces antibodies that "remember" the invader. If the real pathogen appears, the immune system is ready.

Core vs. Non-Core Vaccines

Core Vaccines (ALL dogs and cats need these)

Dogs — DHPP: Distemper, Hepatitis, Parvo, Parainfluenza. Start at 6-8 weeks, booster every 3-4 weeks until 16-20 weeks.

Dogs — Rabies: Required by law. 12-16 weeks, booster at 1 year, then every 1-3 years.

Cats — FVRCP: Herpesvirus, Calicivirus, Panleukopenia. Same schedule as DHPP.

Cats — Rabies: Required by law. Same schedule as dogs.

Non-Core Vaccines

Bordetella (Kennel Cough): For dogs that board, attend daycare, or visit dog parks. Annual.

Leptospirosis: Increasingly common. For dogs with outdoor access.

Feline Leukemia Virus (FeLV): For kittens and outdoor cats.

The Puppy and Kitten Schedule

Maternal antibodies from mother's milk protect initially but also interfere with vaccines. This is why a SERIES of boosters is needed. Never skip the booster series — a single shot at 8 weeks is NOT sufficient protection.

Vaccine Safety

Vaccines are very safe. Serious reactions are rare (1-5 in 10,000). Mild reactions: soreness, mild fever, lethargy for 24 hours.

Titer Testing

Titers measure antibody levels to determine if a pet is still protected. Useful for spacing out boosters beyond 3 years.

The Bottom Line

Core vaccines are essential. The risks of NOT vaccinating far outweigh the very small risks of vaccination. Discuss a customized schedule with your vet.