Petco Text Logo
Petco Pet Logo

Rabies vaccine for small dogs: What's the best age to avoid reactions?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | 3 months and 21 days old | 3 lbs

I don’t know when it’s best to give my dog his rabies vaccine since he’s so small. (Currently 3lbs) I’ve spaced out his shots so the rabies is the last one I need and it will be given by itself (no other vaccines). 2 vets said I should just schedule it at 4 months but 1 vet and and his breeder with over 10 years experience with these dogs says I should wait 6 months. It’s a huge difference in time/opinion and I can’t decide what’s best. Does waiting longer minimize reactions in small dogs?

1 Answer

Most Helpful Answer

Image profile

Answered By Vanessa Yeager DVM MPH

Veterinarian

Published on September 14th, 2017

Hi and thanks again for posting. The rabies vaccine as well as any vaccine is note based on weight. It matters not the size of the dog but the age (3-4 months based on your state is typical). As long as Oliver has not had any reactions to vaccines in the past, he should be just fine. Doing one vaccine at a time will help to not overload his body at one time and that is fine to do. Waiting longer does not minimize reactions in small dogs as long as he has not had a history of reactions to vaccines in the past and is currently healthy. I hope this has helped!

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored