I've got a pen full of 18, 1-week-old bantams right now. It's my first time with bantams, and they're seeming a little tougher than full-size chicks, in fact one passed away during the night :-( BUT! I had been having a lot of struggle with crusty/pasty butts with these babies (yes, they are eating the right chick starter crumbles, fresh water twice daily, rigorously maintained 95-degree living space, generous plenty of room for them to move around), not always the same ones, but seemed like they were all taking turns, a couple at a time. My sister said I should give them poultry probiotics in their water, which I got and started yesterday afternoon. This morning ... ZERO pasty butts. Maybe a fluke? Maybe just that they're a week old and growing out of the problem? Or could probiotics in their water make them all get sorted out that fast? What do you expeienced chicken people think?