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My dog is lethargic and sleeping all day. When should I see a vet?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | 11 years and 5 months old | 10 lbs

Hello hope you’re doing well. My dog is not feeling well today. He has sleept almost all day. He is always energic during the day but today i know hes not good. I took him for a walk and he was so tired and didnt want to. What should i do? Please help im so worried.

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1 Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on September 21st, 2018

Hello! I'm doing well today, and I'm sorry that you are so worried about Kamilo. Lethargy is a very common symptoms of many illnesses such as a systemic illness, infection, inflammation, kidney disease, liver disease, injury, or cancer. I'm not sure if he's eating or drinking, but if he is, I would keep an eye on him for now. Should he still be lethargic in another 24-48 hours, take him into the vet for a check up. If he develops other signs such as vomiting, diarrhea, and stops eating or drinking, take him into a vet immediately. Best of luck, I hope this helps!

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