Two Easy Ways to Start Earning Rewards!
Earn 2X Pals Rewards points at Petco
when you use Petco Pay!
Updated on September 23rd, 2025
Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | unneutered | 8 years and 11 months old
I have a 9 year old dog who has never had any shots. Is it too late or is he too old to get vaccinated?
2 Answers

Answered By Angel Alvarado, LVT
Licensed Veterinary Technician
Published on October 9th, 2018
Answered By Lauren Kennedy, DVM
Veterinarian
Published on August 25th, 2017
It is never too late to start vaccines!
Since Brutus has never had vaccines before he will need an initial vaccine and then a booster vaccine in 3-4 weeks. The only vaccine that does not need a booster is Rabies.
The following year Brutus will need to be vaccinated again and then, depending on the laws where you live and the type of vaccine your vet uses, his vaccines will need to be boostered every 1 or 3 years.
The recommended core vaccines are the distemper/parvo combo and rabies. Based on Brutus's risk factors your vet may also recommend kennel cough, lepto, Lyme, and/or influenza vaccines. These are all a 2 shot series (initial and a booster).
I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach. Best of luck.
10Pet Parents found this answer helpful