I have one barred rock pullet that always has dried runny poop on her butt. THe rest of the hens are 'clean'...just fluffy feathers. I have watched this hen for a month or so, she acts ok, eats, eyes are clear, and the poop doesnt look like it has anything in it out of the ordinary. Is this a problem, or is this just the way that hen is? None of the others have it and i have seen this one poop 'solid'. Is the runny poop on her every night indicative of a problem?