I have 9 two year old hens and just today after having my parents watch them for a week I found out that one of my RIR hens has a swollen eye! I think it’s from one of the other hens picking at her but usually she does not get picked on. I don’t know the cause or what to do?? They’re all mixed breeds, but I’ve never had a problem until now. Also she appears to be fine and is acting normally; clucking, walking around, foraging. Her eye is swollen but the inside is still visible and it looks a little displaced. I tired my best to take pictures, please help!