I've read about people giving their chickens a bath. I have a couple light color birds that are really looking dirty and I would like to clean them up but not sure how exactly. I want some details, like what do you use for shampoo? Do you do the whole bird? How do you dry them so they don't end up all mud? And can you do it any time or does it need to be a warm day? I'm looking for suggestions before I try it myself.