What is the best way to clean poop off a 10 day old chicks back. One of her sisters pooped on her while she was sleeping. Unfortunately, I had to work & didn't find it till it was dry as a brick, stuck in her fluff. These are my first chicks ever & I am having such a blast with them, but I don't want to hurt her trying to get it out of her fluff. Any and all ideas please???