So, I was watching my chickens this last week. They come out of their run, gorge themselves on the proffered mealworms, then wander around, pecking a bit. Then they come over, near me, squat, sort of stretch a wing out and roll onto their side, with their hackle feathers fluffed up. I wondered if they were having a seizure or developing some weird chicken disorder or something. But, I think the blasted things are just reveling in the sun and dirt. It's not quite dust bathing, but all their feathers are fluffed up. They look rather like the have been stomped on and squashed flat. Weird chickens.