I'm up to 19 chicks out. 1 died after pipping, had some yellow foam around it, think there was something wrong with it. Have 3 eggs that won't hatch until 2 days from now(put in later). Out of the last 4 eggs left to hatch today, 2 are pipped and one of them is starting to zip. Candled other 2 and looks like both are dead, didn't see any movement.