I've had my chicks one day now, and they didn't poop much yesterday, or really start eating until last night.This morning they've been pooping more. I picked them up to look, and it doesn't seem like there's pasty butt, but it looks like there's a little but stuck on the bottom of theyre feathers. The vent does not look clogged up at all, and its only a tiny bit on the feather. Should I clean it off or leave it? If they did get pasty butt how obvious would it be?