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Why is my dog's eye closed with third eyelid showing? What to do?

Updated On September 23rd, 2025

Pet's info: Dog | Labrador Retriever | Male | unneutered | 25 lbs

Dog has nictitating membrane half closing his left eye. He's not opening the eye. But no drooping of lid. He's eating well.

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1 Answer

Most Helpful Answer

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Answered By Dr. Dayna, DVM, CVA

Veterinarian, Certified Veterinary Acupuncturist

Published on October 12th, 2017

A closed eye is often a painful eye, and a painful eye should be seen by a veterinarian. A scratch or ulcer of the cornea is the most common reason I see this, although many other problems can cause it as well. Good luck and I hope he improves soon.

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