Same here...I just figure not all digestive systems are as functional as fast as others, one sticky poop is all it takes and some butts are fuzzier than others...or maybe the first poops are released when they are sitting so more likely to stick than fall away?I wish I could narrow down why I always end up with at least a few pasty ones. I hatch at home, I'm nearly positive my heat is just right (the chicks sit under it in the appropriate fashion, not huddled or avoiding it), I don't give them food until they've been in there with just water for a couple hours, I give plain water and chick starter. But I always get a few. I never offer grit though, so I'm thinking I may do that next and see if it makes a difference, since it's the only variable I haven't tried changing. Besides adding ACV to the water, which folks claim works but I refuse to do.