i am treating a young sussex for some similar, if not the same...i did see an older hen "beating her up" so I'm pretty sure that's what's going on with her legs (although another BYC'er suggested looking in to Marek's disease). I have my hen in a box in a spare bathroom with a portable heater to keep it pretty warm for her. I started giving her Hypericum (disolve 1 tablet in a tablespoon of distilled water then give 10-15 drops 2x per day). She didn't have an appetite before I started this...an hour after the first dose, she ate 1/2 slice of bread. I'm also giving her 3 drops of poly-vi-sol 1x day. She is eating, drinking and sleeping (quite a bit). I've had her confined since last Sunday and she's hanging on. Good luck with your roo