I had one with my very first hatch. This was pre-BYC, so I didn't know any better - I picked it off, little by little. It worked just fine; I sort of used my fingernail to split the big chunk into smaller ones (I know, gross) then I slowly pulled it off. With the poo came her fluff, but this ended up being a good thing - nothing around her vent for the poo to stick to. She pooped immediately in my hand when I cleared part of her vent, then after I got the rest of her cleaned up I put her back down and she pooped AGAIN in the brooder - a big pile. We named her DooDoo!