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.
4 Answers
Most Helpful Answer
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.
1Pet Parents found this answer helpful
Related Answers from Veterinarians
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Published on July 6th, 2017
Poor Angel! I am very concerned that he is very lethargic and I think he should be examined by a vet to determine why he is so lethargic. He could have an infection, parasite, pancreatitis, liver disease, kidney disease, diabetes, Cushing's disease, Addison's disease, etc. and a vet can run some lab-work to help diagnose. He may need fluids to prevent dehydration and other medications. Please call a vet and have him seen so treatment can be started. Hope he feels better soon.
1Pet Parents found this answer helpful
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Published on October 5th, 2017
It can be a sign there is eye irritation or infection in or around the eye, or it may be sign there is something else going on and she doesn't feel well. Look for any redness in the eye or cloudiness or mucoid discharge. You can take her temperature with a rectal thermometer to see if she is running a fever (normal is 100-102.5). All you can do is rinse her eyes with sterile eye drops such as Artificial tears and keep them clean until you can get her seen by the vet. If her appetite decreases or she begins to feel more lethargic, then I would try to get her seen sooner.
1Pet Parents found this answer helpful
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Published on March 23rd, 2017
If he is really lethargic than he should be examined by a vet to determine the cause. He could have an infection, inflammation, endocrine disease, liver/kidney disease, etc. and your vet can run lab-work, if needed, to help determine the cause. He may just need an antibiotic and some fluids to help treat his problem.
1Pet Parents found this answer helpful
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