HISTORY -- I had 4 Buffs until a month ago. Now there are 3. They are 13 months old. 1 hen is broody and I am letting her ride it out, the other 2 are fine - I thought. I am getting 1 - 2 eggs per day. PROBLEM -- 1 of my 2 laying chickens has had a dirty looking bum and feathers. I did not think of it as sticky bum, as there was nothing stringy or hanging or apparently blocking per ability to poop or lay. The feathers were just grungy looking. As the issue continued I looked closer and saw that she has a rather good-sized area without feathers. ACTION TAKEN -- I filled a tub with warm water and had my husband hold her submerged just enough so that I could really try to wash her bum. I am still not really certain where her vent is... I did not do any probing. While she did not seem to mind the bath, I was a little grossed out and hesitant to explore too much. QUESTION -- Please tell me what is going on and if she is going to survive. She looks good (other than her bum). Her comb is red and standing. She is eating (and pooping as best I can tell) and I believe she is laying. Please note that the photo was taken just minutes after her bath.