I have 3 larger breed chicks that are almost 4 weeks old, and not one of them ever had pasty butt (and believe me, I checked!). I went back to the same feed store, a very small, locally owned one, not a big chain, and got 4 assorted banties last week. Oh my gosh, I have been dealing with pasty butt since! The D'uccle has not had it all all, but the OEGB and the Golden Sebright have been fighting it bad! The Silver Sebright was pasted up once yesterday, but hasn't pasted back up since I cleaned her up. Other than keep checking them and cleaning them up when needed, is there anything else I can do? My mom has raised chickens forever, and said they need grit, but they seem so little, plus their chick feed already has some, right?