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Why is my dog suddenly losing weight, drinking lots, and not eating?

Updated On September 23rd, 2025

Pet's info: Dog | Pug | Male | neutered | 6 years and 9 months old | 20 lbs

My dog had a bad flea infestation hes recently lost 20 lbs quicky he drinks a lot of water he wont eat

1 Answer

Most Helpful Answer

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Answered By Sara Farmer, DVM

Veterinarian

Published on October 15th, 2018

I would be very concerned about that amount of weight loss and I doubt it would be related to fleas alone. Kidney disease, diabetes or certain types of cancer could cause weight loss and an increase in water consumption. I would recommend seeing a veterinarian- they may recommend checking some blood work after a physical exam.

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