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Why is my senior dog skinny but still energetic and vet says healthy?

Updated on September 23rd, 2025

Pet's info: Dog | Pit Bull Terrier | Female | spayed | 14 years and 2 months old | 31 lbs

My 14 yr old pit bull has gotten so skinny in the past few years. She still has lots of energy & strength. The vet says she is healthy, but I still worry. Any ideas?

1 Answer

Most Helpful Answer

Kevin Sanada, DVM

Answered By Kevin Sanada, DVM

Veterinarian

Published on September 6th, 2017

Chronic diseases and cancer can cause a condition known as cachexia where they get very skinny; but they would also have other signs of disease. The hallmark of cachexia is muscle wasting; so if Val seems to have a lack of muscle on the upper legs and spine, then I would be worried that there is some chronic condition.

If the legs look like they have good muscle and the spine is not obviously jutting out, then this is not cachexia and would not be a concern. I'm assuming the veterinarian had already ruled this out, so that's why they would not be too worried.

If it's not cachexia, then it is probably a good thing that she is thin, because skinny dogs, on average, are healthier and live longer.

If it is cachcexia, then I would have the bloodwork checked for any signs of disease or organ failure. I would also check for parasites, as this can cause weight loss over time.

I hope that helps and all is well with Val.
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