I have 3 hens (1+yr old) only 1 lays a white egg the other 2 lay a brown eggs. I get 3 eggs a day without fail. Yesterday I went to collect eggs found 1 white, one brown then the top 1/2 of another brown egg all cracked in the nest. It was only the shell no yoke. Today i got 1 white egg and 1 brown egg. I have heard of eggs breaking inside the hen. How can I tell if this has happend? I am under the impression it could be dangerous.