I believe that's what it's called. My aunt recently bought baby chicks, and one of them has poop attached to it's rear end. They've tried putting baking powder in the water, using vaseline, wiping it, etc. and can't seem to get it cleared off. What else should can they do? They don't want to lose the chick. Thanks.
A couple of mine came that way. I just dipped their butts in warm water and then used a warm wet cloth to clean it off. Good Luck!
I used olive oil on a paper towel. I held it on the vent (it was drenched in olive oil) and then did have to pull a bit out of the vent. It worked well, no more pasty butt after that treatment! Be gentle, though, they're delicate little creatures!