I need help for my 13 week old Dark Brahma Roo, Honey Badger. When I went out this afternoon to bring the chickens some watermelon I noticed that his right eye is swollen. Anyone have any idea what this could be? I do not see any visible injuries anywhere on him. He is currently separated from the flock in a dog cage by himself. I did change out their litter yesterday from pine shavings to aspen pellets but I would have thought that would bother both eyes... Thanks for your help!!
front view
left (good) eye
right eye
top view