I have 7 slightly over 1 week old chicks. One of them keeps chirping loudly and pecking at her butt. She doesn't appear to have pasty butt, however her butt is bare. At one point, it looked like she was trying to poo out something white, but it didn't finish coming out... hard to tell though because she was under the heat plate. The other chicks aren't seeming distressed at all, just her.