How do you clean a dirty chick?

Oh, poor chick. She really looks uncomfortable.
Anyway, as everyone says, just cleaning the coup makes them clean. I wonder how they wash themselves.

washing machine? o:)

I noticed as I played it seems the further they are from the coop the longer it takes for them to register as clean after you care for the coop. So you could try the call chickens in action and then clean the coop with them all inside and see if they all get cleaned at once.