I have four chicks that were born in March of 2013, they are healthy and beautiful! My problem started when we had very hot weather and then the next week I had a new deck built in "their" yard. My Buff Orington started keeping to herself in the coop almost all day long and stopped laying. I have taken her to a doc, no parasites, no eggs stuck in her. She suggested I put ice in the nest to cool her vent down. My brown leghorn has decided to pick on her whenever I get her to come out. I have isolated the leghorn twice and she is still so mean and pecks at the Buff. And now none of the flock are laying!! I really am so frustrated! They were all producing and doing good until a few weeks ago!! Any suggestions?