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Why are all my dogs suddenly sick with fever, lethargy, and red gums?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | unneutered | 1 year and 4 months old | 12 lbs

I have several dogs who started to present symptoms I am not familiar with. First it started with mucous eye drainage then fever and lethargy with foul smelling breath, they also have bright red gums. No coughing, no sneezing, no vomiting and no diarrhea. They are still eating and drinking and have small bursts of energy. In general though they are u.set the weather and sleeping. What could be the cause? They were fine one night and then the symptoms began the next night.

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1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on September 18th, 2017

I'm sorry all your dogs are suddenly sick! Thank you for providing pictures of one of your dogs. From the picture of the teeth, I see areas of redness, but they appear to me to be localized around the teeth itself. It makes me think those red areas may be due to gingivitis, but without seeing your pups in person, I can't say for certain. When I hear that all dogs in a family have suddenly gotten ill, I think that they have either gotten into something rotten or something toxic. Given that all your dogs are ill, the best thing to do is have them seen by a vet as soon as possible. The vet can diagnose what is causing their symptoms, and can treat them. I hope this helps, and good luck!

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