I've got a bra/saddle combo because one of the 'dotte hens just loses her feathers if you look at her cross eyed. The roo isn't even nasty or mean to her (I do NOT tolerate a mean roo in the least), if anything with the saddle, he's more careful with her. But she's in molt now, so she has NO feathers. It's sad looking. So she got a bra to cover up some because she was just getting scratches and owies from general chicken life with nothing protecting skin.
Sisters don't have the feather problem, her feathers look fine, she acts fine, chicks from her sisters don't have feather problems. She just doesn't get to lay eggs that are hatched, she just gets to play broody hen and raises any random chicks we get. She's the only hen we have who we can get to go broody on command. Put new chicks in a brooder, put her in a pen next to them at night, by am, she's up and pacing back and forth by the brooder to mother those chicks. Let her in, she's on her babies and purring her fool head off.
Her broody talents and excellent chick raising skills are the only reason she's not in a stewpot.