This is a 4 week old Barred Rock. It has always seemed healthy- eating, drinking, and very active...behaving just like the others. However, since the day we got it (a few days old), it has ALWAYS had pasty butt! I have to give it baths on a regular basis or it gets big chunks of poop stuck to it. I didn't think it was normal for it to continue on this long! Here is a picture of its vent. It has always looked like this- does this look abnormal to you? If so, what can we do to help it? Thanks!