Kittens need 3 to 4 vaccine visits between 6 and 16 weeks, then boosters every 1 to 3 years for life. Yes, even indoor cats. This checklist covers what's required, what's optional, and when to set reminders.
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The kitten series builds immunity during the window when maternal antibodies are fading. Timing matters. According to the AAHA and AAFP vaccination guidelines, the final dose should be given at 16 weeks of age or older to ensure adequate immune response.
| Age | Vaccines | Notes |
|---|---|---|
| 6-8 weeks | FVRCP (1st dose) | Rhinotracheitis, calicivirus, panleukopenia |
| 10-12 weeks | FVRCP (2nd dose), FeLV (1st dose) | FeLV recommended for all kittens regardless of lifestyle |
| 14-16 weeks | FVRCP (3rd dose), Rabies, FeLV (2nd dose) | Rabies legally required; final FVRCP in the series |
| 12-16 months | FVRCP booster, Rabies booster | One-year boosters establish long-term immunity |
After completing the one-year boosters, your cat moves to the adult schedule. Set a pet vaccine reminder for each due date right after the vet visit while you still have the paperwork in hand.
Indoor status reduces risk. It does not eliminate it.
Viruses like panleukopenia can survive on surfaces for over a year. You can carry them indoors on shoes or clothing without knowing. Rabies exposure can happen through a bat entering the home. That's why even strictly indoor cats need core vaccines.
| Vaccine | Frequency | Who needs it |
|---|---|---|
| FVRCP | Every 3 years | All cats |
| Rabies | Every 1-3 years (varies by state and product) | All cats (legally required) |
| FeLV | Every 12 months | Outdoor cats, multi-cat households, cats with outdoor access |
Feline injection-site sarcoma (FISS) is a rare but serious complication of vaccination in cats. The ABCD (Advisory Board on Cat Diseases) recommends the 3:2:1 monitoring rule after every vaccination:
If a lump at the injection site is still present 3 months after vaccination, have it evaluated.
If the lump is larger than 2 cm in diameter at any point, have it evaluated.
If the lump is increasing in size 1 month after vaccination, have it evaluated immediately.
This rule is precautionary. Most post-vaccination lumps are benign and resolve on their own. But early detection of FISS significantly improves treatment outcomes.
Indoor cats still need core vaccines: rabies (legally required in most states) and FVRCP (feline viral rhinotracheitis, calicivirus, panleukopenia). Viruses can enter your home on shoes, clothing, or through screen doors. Indoor status does not eliminate risk.
The 3:2:1 rule is a post-vaccination monitoring guideline: any lump at the injection site that is still present 3 months after vaccination, is larger than 2 cm in diameter, or is increasing in size 1 month after vaccination should be surgically evaluated. It screens for feline injection-site sarcoma, a rare but serious complication.
After the kitten series and one-year booster, most core vaccines shift to a 3-year cycle. FeLV (feline leukemia) stays annual for at-risk cats. Your vet will adjust based on your cat's lifestyle and exposure level.
Kittens receive their first FVRCP vaccine at 6 to 8 weeks, with boosters every 3 to 4 weeks until 16 weeks of age. Rabies is given at 12 to 16 weeks. The full kitten series typically requires 3 to 4 vet visits.
Yes. Outdoor cats face additional risks and typically need FeLV (feline leukemia virus) vaccination on top of the core vaccines. Your vet may also recommend FIV testing and more frequent boosters depending on exposure to other cats.
Enter the next due date from your vet's records. Get notified before the booster is due, not after it's lapsed.
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