What would cause an emu chick to almost fully develop and then die? I ordered two hatching eggs with chance of blond/white, and one hatched (blonde). The other I broke the egg open at 60 days and it was dead (also blonde), but was almost fully formed and just had some of the yolk sac left to absorb. Out of 9 eggs I have bought this year, 7 of which were shipped, I have had 6 hatch, and 2 that never started developing, but this was the first one who developed and then stopped. It was also the smallest egg at 469 oz, so I’m wondering if that had something to do with it.