Thoughts went through my head akin to the experience of giving a cat a bath. All sorts of horror stories abound in regard to that, although we have several cats who don't mind baths at all. I just couldn't picture how a chicken would react to this. But there was only one way to find out.
I ran several inches of warm water in the bottom of our tub, grabbed an old bath towel and headed out to the coop. It was later in the day and I hoped they would all be in the coop, making it easier to scoop Layla up, but they were still out in the run. I opened the door and Layla was the first one to head out, making her easy to catch. I wrapped the towel around her and took her to the house.
The inside cats didn't know what to think as I walked through the house with a big bird that was making quiet little chicken sounds. Layla seemed content in my arms and when I unwrapped her and put her in the tub, she had no reaction at all. So I started using the warm water (no soap) to clean her butt and before long, she was all clean again.
I towel-dried her and used the blow dryer on low to dry her feathers as well as I could. She seemed to want to sit in my lap the entire time, so even after I got her pretty well dry, we just sat on the floor there - Layla and me - sharing precious chicken moments.
I took her back out to the coop, I spread fresh, dry pine shavings all over the floor of the coop and in the nesting boxes and she promptly hopped up on the roosting bar for the night, with her girlfriends. The whole thing was really uneventful, except for the cooing, which was just sweet - like Layla.