Speckled Sussex with swollen chest. She is not moving much and not sure she is eating/drinking properly - or even laying eggs. She was born end of June and started laying eggs a day before Thanksgiving. We noticed her sick/lazy behaviour a few hours ago. I'm thinking she should be seperated as we have 27 chickens and if she is going to be sick/die, I want the others to be healthy. And I am a first time chicken owner, so any advice would be helpful! Thank you! Barbara