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My dog's temperature was high, then dropped. Does he have a fever? What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | neutered | 7 months and 29 days old | 40 lbs

Hey, I used a thermometer and my digs temperature was 104.1 then I checked a few hours later and now it's 100.1. Does my dog have a fever and if so what can I do besides take him to the vet? His nose was dry and now it's a bit wetter. I'm worried he is really sick. He also has not eaten all day. He's less energetic and once his temperature went down he seems to feel a bit better. I took him outside so I think the air helped him.

1 Answer

Most Helpful Answer

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Answered By Jessica Keay, DVM

Veterinarian

Published on May 30th, 2018

If your dog had been exercising or out in the heat it is possible his temperature could have increased due to this, but 104.1 is a pretty high temperature if you feel it was truly an accurate reading. We can see dogs temperatures get that high if they are really hot/excited/stressed and they are overweight or brachycephalic (smoosh faced) but I am concerned that his energy level was decreased. If he still doesn't seem himself tomorrow then I would bring him in for an exam. If overnight his temperature gets very high again, or he becomes weak, has trouble breathing, or his gums become pale in color or he starts having other symptoms like vomiting and diarrhea then I would consider bringing him in to the emergency vet.

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