I'm having the worst hatch ever, about the same time my eggs went in the bator i found illness in the flock. not tested but most likely CRD, last night an embryo was active, day 20, this morning it was dead. when i opened it i saw mostly developed ,bean sized yolk left but, it was covered in a green goo, or slime. i have never seen this before and wonder what it could be? one keet out of 30 survived and 4 chicks out of 14. i still have two chick eggs yet. i know i'm not supposed to mix different hatch dates but i have done so successfully before. and it just worked out that way. any thoughts would be appreciated.