Hi chicken lovers! I notice my RIR hen, about 3 yrs, has grey legs. Her butt is poopy and she has black spots on her comb, but they are small, not bumpy and didnt start out as white, either. She has a sneeze, maybe a cough I dont know the diff. We put fresh hay in their nests, Permethrin .25% on their butts, and in their 1 dust bath area too. We washed off the poop and trimmed her butt feathers to find that her whole vent area is bare, and very smelly! It sticks out and is squishy. We went ahead and put Duramycin-10 (tetracycline hydrochloride) in their water because I noticed 2 other hens also have small black spots on their combs (maybe I'm paranoid & its really dirt, I dont know) The 3 other hens have soft clean feathers on their rumps.... Do mites cause all those symptoms? What should we do now? Should we toss the eggs after they've been treated w/ permethrin? What about Duramycin? Probably ya. Technically speaking, isnt she passed her egg lying prime? Would she make better soup? I'm not into taking care of a dying bird if you know what I mean, but I don't want to eat something tainted, either. 1 other Q? & maybe related? We dusted one other hen's butt and it looks fine, but her legs are very scaley. Mites? How do we get her legs smooth? And, she's always had gangly nails. Is that an issue, should they be trimmed? And if so, how? Ok, 1 more Q? Should we put the Duramycin into our pullets' water too? They are seperated but still kinda in the same area. We did dust their butts for extra measure, but they all seem fine. Thanks for all your info!!!