Was it the broody hen? Was it the rooster? Or was it the two other full grown hens in the coop? And why? Right now I separated the rooster because that was the easiest to do and (to me) the most likely culprit. But I will be away this weekend with someone else watching them. And momma hen's beak was kind of sticky. I can't get a gauge on the other hens' or rooster's beak to see if they are sticky. There was NO trace of the not quite hatchling. Just the shell.