First I would make a saline was 1/8 teaspoon of salt and a cup of water. Boil the water and add the salt let it cook down till it’s comfortable on your wrist pour it over this eye you want to rinse it out real good and be sure to mix the salt in real well before using. Do you have any Terramycin eye ointment? Many feed stores carry it and you can. Get it on line too if this is an infection the Terramycin will clear it up if a irritation the wash should help. Is it just one eye and is there any other symptoms raspy breathing? And do they get to play in the tub or pool?