EMERGENCY: So upset right now. Today is hatch day with my broodies and their 6 eggs. 5 barnyard mix EE's and 1 bantam barnyard mix. I traded 6 infertile eggs for the farm's possibly fertile eggs. I went out earlier this morning to check on the girls and their eggs and all was well. 2 hours later I notice both hens off the nest and what looks like an exploded egg. On further investigation I notice that my BO has yolk stuck to her beak and blood on her chest. I decided to go into the broody run and find that the egg is crushed and there is a fully developed chick still alive but barely. Within seconds it perished. Is this normal? Was she startled? Should I get the BO out of the brooder and let the OEB continue on the hatch? Should I just leave them alone and hope she doesn't kill the last 5?