Hi all, I'm new to hens so I hoe you can help. We recently bought 4 isa brown hens, they have started to lay. The other day I noticed that one hen was pecking the others. Then we noticed that one hen has lost her right eye. I think its actually blind in one eye now, and rest of her face is swollen red and nasty. Help! I have washed it with saline solution but dont know what else to do.