Petco Text Logo
Petco Pet Logo

My senior dog has growing fatty lumps under his leg. Should I worry?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | neutered | 11 years old | 116 lbs

My Labradane is 11 now and has alot of what I was told are fatty lumps. Some are quite large and ine has gotten bigger due to alot of smallnones connecting together behind his front leg. Like in the arm pit area. Should I be concerned? (He seems to be moving/running around just fine and not bothered by it. )

This question includes photos that may contain sensitive content. Click to view.

View more to consider that the photos may include sensitive content.

1 Answer

Most Helpful Answer

Image profile

Answered By Vanessa Yeager DVM MPH

Veterinarian

Published on November 28th, 2017

Hi and thanks for your post on Petco Pet Education Center, formerly Petcoach! If the masses have been diagnosed as fatty tumors by your veterinarian, then there is no need to worry too much. These fatty tumors do grow but typically do not cause a lot of problems. Sometimes they can grow quite large and impede mobility but unless that starts to occur, there is no need to worry. I hope this helps and I wish you and Odie the best!

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