Over the past 4 days I've rescued 4 kittens whose mom passed away. The mom was feral so the kittens were outside in the bushes before I got them. One of them has his one eye shut and there's goo coming out of it. I carefully cleaned the soft goo with a warm q tip, but didn't try to open the eye or remove the hard goo. The first photo is before cleaning. What can I do to help the poor kitty's eye?