Within the last couple of days I have noticed a couple of my animals (a chicken and my cat) are having trouble with one of their eyes. The eye is swollen. It's completely shut on the chicken and mostly shut on the cat. Both have a white mucus discharge coming from the eye. Upon cleaning the chicken's eye I can see it is very red. On the cat I can see part of her third eyelid covering her eye. Of course I'm not sure if the two cases are related, but they showed up at the same time and have the same symptoms. Any ideas? The chicken is an adult buff laced polish hen. Otherwise very healthy and laying just fine. She's been acting a little lethargic since she can't see as well, but is still eating and drinking.