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Why is my unspayed dog in pain, can't walk, and has a breast lump?

Updated On September 23rd, 2025

Pet's info: Dog | Collie | Female | unspayed | 15 lbs

My dog, Ingrid, is having trouble walking on her back legs, even using them. She is in constant pain and is crying, it’s been all day since about 3:30 pm today. She has a lump near her lower breast, and doesn’t seem to be bothered by it. She didn’t have any of these symptoms yesterday, and I’m extremely worried. She is not “fixed” and I can’t have anything happen to her, she’s my baby girl.

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2 Answers

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on April 11th, 2019

Ingrid needs to see a vet now. It's very concerning that you describe her as being in constant pain and is crying. This lump by her lower mammary gland could be a mammary tumor, which are common in intact dogs. Do not give her any human pain medications, many are toxic to dogs and can be fatal if given. Please take her into a vet immediately.

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on April 16th, 2020

    Cassie isn't spayed, so this could be a mammary tumor. In dogs, 50% of mammary tumors are malignant. This could also be an infection. Without seeing her in person, I can't say for certain. I'd have her seen by a vet first thing in the morning to get this diagnosed and treated. Best of luck.

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