A couple of days ago, I noticed my mare had a weepy eye. The fluid was clear. It looked like she was crying at one point there was so much fluid.
Yesterday morning she had lots of eye snot (sorry about the term but that's what we call the eye gunk you get in the morning sometimes :))
This morning, all under her eye was crusty and there were large pieces of yellowish snot stuck in the corner of her eye. Her other eye is fine though.
I cleaned it yesterday and today with a saline solution as I have no idea what the prob is and I had nothing to treat it with anyway.