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Why is my active senior dog losing weight despite eating well?

Updated On September 23rd, 2025

Pet's info: Dog | German Shepherd | Male | 9 years and 7 months old

Hello, my ten year old German Shepard has lost a lot of weight. He was never a puffy dog, he has always been a bit skinny, but now it can be seen more. He eats well and is very active. Do you think it is because of the age or something else?

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1 Answer

Most Helpful Answer

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Answered By Megan, DVM, CVA

Veterinarian

Published on May 15th, 2018

This could be due to several things like age and losing some muscle mass, he may need an increase nutritional requirements, liver or kidney problems, cancer or something else. You could get a baseline weight and increase the amount of food you are feeding as long as there is no other symptoms to see if he puts on some weight. I would reweigh him in 2-4 weeks. If he is still loosing weight or not gaining any weight or if you start seeing additional symptoms, I would have your vet take a look at him. Your vet will be able to do a fecal, blood work and even x-rays if needed to help determine the cause of weight loss. I hope this helps and he starts to gain weight quickly.

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