I just learned think trick for a 1 week old kitten I have. He has an eye infection, and this is before his eyes were open, the poor things eyes, or eyelids, swelled up like they had marbles in there then popped. The vet couldn't do anything for him, but my sister found a site on the internet that said after you clean the eyes, put a drop of cod liver oil in the eyes. It is suppose to help with the infection, but also seems to keep then from crusting up and sticking. I checked the kitten this morning and hi eyes were almost crust free.