When Do Kittens Need Shots?
QUICK ANSWER
Kittens typically receive their first vaccinations at 6 to 8 weeks of age, followed by boosters every 3 to 4 weeks until they're 16 weeks old. Core vaccines include FVRCP (feline viral rhinotracheitis, calicivirus, and panleukopenia) and rabies. The full series is essential for protection against deadly feline diseases.
The kitten vaccination schedule can look complicated, but it follows a simple pattern. Here's when each shot happens, what it covers, and why the boosters matter as much as the first dose.
What vaccines do kittens need?
Core vaccines recommended for all kittens by the American Veterinary Medical Association include FVRCP (a combination vaccine covering feline viral rhinotracheitis, calicivirus, and panleukopenia) and rabies. Non-core vaccines that may be recommended based on lifestyle include feline leukemia virus (FeLV), which is especially recommended for kittens that will go outdoors or live with FeLV-positive cats. Your vet will recommend the right combination based on your kitten's risk factors.
What's the typical schedule?
The standard timeline is: 6 to 8 weeks for the first FVRCP, 10 to 12 weeks for the second FVRCP (plus FeLV if recommended), 14 to 16 weeks for the final FVRCP booster and rabies vaccine. After the kitten series, FVRCP is boostered at 1 year, then every 1 to 3 years depending on the vaccine type and your vet's protocol. Rabies is given every 1 to 3 years per local law.
Why do kittens need so many boosters?
Kittens receive temporary immunity through their mother's milk (maternal antibodies), but these fade at unpredictable rates. The maternal antibodies can also interfere with vaccines, preventing the kitten's immune system from responding fully to a single dose. The multi-dose series ensures that by the time maternal immunity wears off, the kitten has received enough vaccine exposure to build their own lasting protection. The final dose at 16 weeks is especially critical because it's timed for after maternal antibodies have almost certainly faded.
What if I adopted an older kitten with unknown vaccine history?
If your kitten's vaccination history is unknown, your vet will typically start the series from scratch regardless of age. It's safer to over-vaccinate slightly than to assume protection that may not exist. Most shelters vaccinate on intake, so if you adopted from a shelter, ask for the vaccination records; they should have documentation of what was given and when.
The kitten vaccine series is one of the most important things you'll do in your cat's first year. Follow the schedule, don't skip boosters, and keep the records. It takes a few vet visits over a couple of months to set your kitten up with protection that lasts years.
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