Hi There, I am totally new to chickens. I have 1.5 week old chicks who are pecking at their rear ends. They are obviously developing feathers, that I can see. But my concern is that a couple of them are pecking all of the fluff and feathers off of their rear ends, leaving their skin exposed and the feather matter dangling off of their bottoms. I see that some of them have some fecal matter building up on their bottoms as well. What should I do? Am I supposed to bathe them regularly so they don't get a build up of poop on their bottoms? Is this normal? I'm clueless! Thank you in Advance!!