My 2 year old Red Star girl has several odd symtoms that I'm not sure how to treat. She lives with 11 other chickens that peck at her sometimes. Her feathers are thin in the best of places, and bald on her head, shoulders and back. This might just be from the roosters, or could something be giving her a predisposition to breakable feathers? Her vent has also become very stretched and wide, and the top part of it has become red and a little inflamed. It seems like this has been going on for a couple of months, and I've been finding soft shelled under the roosting poles for quite some time, too. Tonight I witnessed the Red Star squirting out another shelless egg, and I'm getting a little worried. She's been eating and drinking and acting normally, seeking plenty of attention and snuggles. I haven't paid much attention to her poops, so I'll be doing that in the next few days. The other birds seem to be doing just fine, though one of them recently came up blind in one eye. I attempted to search for some clue of what's going on with my hen in the BYC archives, and immediately turned into a chicken-hypochondriac. Could she have worms? Is she just stressed? If it is worms, I'm going to need plenty of advice and links on how to treat them. What do you think?