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Why are my senior dog's third eyelids showing and he's lethargic?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 9 years and 11 months old | 50 lbs

Hi my dog has both third eyelids showing. He seems a little lethargic but is eating ok. He is on thyroid medication. He is a mixed breed, medium sized dog and is almost 10 years old.

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on April 14th, 2019

This can be a sign of dehydration or an eye infection. Make sure Lou is drinking plenty of water, adding water to his food to get him more moisture. If his third eyelids are still showing in the morning, have him seen by a vet.

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