Petco Text Logo
Petco Pet Logo

Why is my 4-year-old dog always in heat, nipples swollen & moody?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | unspayed | 16 years and 7 months old | 45 lbs

My dog is about four years old and she always seems to be in heat, her nipples are always swollen and she always seems to be temperamental. What is going on with her?

1 Answer

Most Helpful Answer

Image profile

Answered By Jenny, DVM

Veterinarian

Published on December 18th, 2017

She may be in a false pregnancy cycle or have an infection in her uterus due to hormonal changes. Temperamental can be related to this or it may be a sign of pain or dominance at her age. The best thing to do is have a vet check her for an infection or a false pregnancy. From there you can discuss having her spayed to prevent future heat cycles so you no longer have to worry.

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