I noticed on my hens feet about 3 weeks ago a little spot on one of her legs that looked like one of the scale looking things on her legs had been irritated and had a little dried blood around it. now as time has past more and more spots have shown up. i have been washing her feet with water every once in a while to keep some of the dirt off of it. there is no sores on her bottoms of her feet, just on her legs and toes. Is this common? i was wondering if it was due to the really cold weather. she has no problem walking they just look really dry and weathered.