My mommy hens started eating their babies today and so far I saved two that were in the process of hatching. 2 were killed that werent even ready to hatch. Anyway, the one chicken wasnt even out of the egg yet so I pulled it out and saved her before mommy could kill it. And there is something big coming out of its butt. I dont know what this is. Am I suppose to pull it out or let it come out on its own? Looks like the afterbirth????