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My dog has a huge, hanging lump like a cow's udder. Is it serious?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 10 years and 4 months old | 20 lbs

Please help. My mums dog has this huge lump feel like a cows udder and hangs like one. My mother won't take him to vets because she says they is nothing wrong with him. I can't take him to vets because he's not my dog and doesn't live with me. What could it be ?

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1 Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on May 13th, 2019

In a dog of Deno’s age, I’d be concerned this could be a malignant tumor. It could also be a benign tumor, a cyst, or lipoma. Any suspicious lumps should be checked out by a vet. I would tell your mother you spoke to a vet, who said it was important to have this checked out by a vet. Best of luck.

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