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My senior dog has hard lumps and heavy breathing. What could it be?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Female | spayed | 11 years and 5 months old | 100 lbs

My 12 year old lab mix has these hard nodules forming on her. One on her back towards her tail, and now more on her chest. About the size of a quarter and quarter inch thick. I'm scared if I bring her into a vet they will say cancer since she is an older dog. Are there other causes that would do this other then cancer ?also she has started breathing heavily if she walks any distance at all and has a soft mass firming on the side of her neck. Eats and drinks fine and does not act in pain at all.

1 Answer

Most Helpful Answer

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Answered By Destini R. Holloway, DVM

Veterinarian

Published on July 27th, 2017

I know it can be scary when thinking about possible cancerous masses in your pet. But really the only way to know for sure is to have these masses tested through your vet. They can be cancerous masses, inflammatory reactions or benign tumors (non-cancerous). The heavy breathing that Allie is doing does concern me a bit. This can either be a sign of pain or an underlying lung or heart disease. So a vet visit although no desired, is probably the bext best thing to do for Allie in figuring out what's going on with both concerns. Best of luck getting some answers and take care.

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