Over a month ago the chickens started attacking/eating there own eggs. I have oyster shells out they never seem to bother with them. Anyway to make this stop. Half the time they don't even eat the whole shell. Its like they are boycotting me getting eggs. Suggestions? on top of that issue. The other day a Red tail Hawk came by looks like it chased around the birds for awhile and killed one of them. Now they barely come out of the coop. Any idea how long it will take for them to get out of the funk? I haven't even let them out of the run. Its 144sqft and only 5 chickens now so they have space. Just feel like they should be getting fresh grass and bugs.