It was a nightmare for me to try to remove it. Hard as set concrete, and soaking, q-tips, you name it, didn't work much. I struggled and struggled, and they all survived, but it was thru blind dumb luck, I'm sure.
Kodster, makes perfect sense, all of the chicks that I have with Momma hens, never have pasty butt. None of them ever have, none have it, now. I also have mixes of every type of breed all in the same clutches, as the hens just start up and go with what eggs they have found. I also tuck eggs under their wings until they stop taking them to get particular birds/eggs hatched. I have bantams and standards all with the same hens and NO pasty butts! YAY!