Recently we adopted some hens that are about 2 yrs old. Our coop was invaded by a dog and nearly wiped out our entire flock... Anyway, one of these hens (Buff Orpington), lays an egg then turns around pokes a hole in it and sucks out the insides and leaves the shell. We keep her contained in a separate "reptile" tank outside... When she manages to escape she goes right to the coop where the other hens lay, and she sucks out all their eggs! This is so aggravating! It is a pain to keep her separate. And we have tried the fake egg trick... she will peck that thing the rest of her life and any other egg she sees. I think she is mental. We don't have the resources to built new boxes right now where the eggs fall out of their reach. What should I do about her? Any suggestions are welcome!