I have two litters that have just opened their eyes. Seems like about half of them are having problems with their eyes. I haven't had a case of this in the last couple of years. Cage hygiene is good, I always keep the boxes clean and dry, both does have had litters before with no problems, same with the bucks. The only difference with these litters and previous litters is nest box materials. I used to use a layer of pine shavings topped with grass hay. I have since switched to using a layer of paper shavings topped with grass hay. Is it possible the different shavings could be a cause? Maybe something in the hay? Any opinions or ideas would be appreciated. I am treating them now with terramyacin ointment and it's getting better, but I'd really like to figure out what I need to change. Thanks all!