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My dog has uneven chest muscles and a fatty lump. Is it genetic?

Updated on September 23, 2025

Pet's info: Dog | Cockapoo | Male | neutered | 6 years and 1 month old

My male dog has a very obvious chest muscle on one side but completely flat on the other side! He also has a small fatty lump on the side which hasn't developed. He was born with one eye if that makes a difference (something genetic?)

1 Answer

Most Helpful Answer

Dr. Elizabeth

Answered By Dr. Elizabeth

Veterinarian

Published on January 17, 2019

That is not generally normal to see a discrepancy between the muscle masses. That can indicate disuse, nerve injury, muscle injury or skeletal injury. I recommend to make an appointment to have this evaluated. Often times there is physical therapy to condition the muscle. The doctor will also check for any signs of pain as medication is indicated for that. Lastly, if the mass appears concerning, the doctor will recommend to take a small sample of cells out to look at under the microscope.
I hope this is helpful and please feel free to post any additional questions.
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