Originally Posted by tealamutt
That third eyelid looks suspicious to me. How old is your mare? I might take a biopsy of that if she were my patient...
I would just like to say you nailed it.
To give a little update, the vet came out a couple of weeks ago.
She had cancer on her third eye lid. He went on to explain how it wasn't as uncommon as you'd think. As soon as he looked at it, he knew what it was.
He cut the cancer out and since then, the mare is doing fine and the eye is completely healed. Its a good thing he looked at it when he did, it could have caused her to lose her eye. She's acting like a brand new horse, and is doing great!
Thanks again, you were spot on.