Updated On September 23rd, 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
Published on January 17th, 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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