We have 9 feral kittens (from several different mothers), many of which have severe conjunctivitis. Their eyes are totally "glued" shut. I called my vet and they gave me some meds. I used some cotton balls to help me open the eyes but one of them had a bunch of mucus or something that came out of the eyes. The others didn't. Now today, the mucus one were closed again. Is this normal? What do I do?