This morning I went to let my flock out and found that one of my red star hens lying dead where they roost, as if she had died in her sleep. About 2 weeks ago another of my chickens was found this way. I am extremely worried for my flock. Everyone seems healthy and has been acting very normal. I am not sure how old this hen was because she was given to us last summer, however the woman told us that she believed them to only be a year old. When they were given to us we took many precautions introducing them to our 3 EE's. They were not fully integrated until September, but have been living together happily since. The hens that have died so far showed no symptoms leading up to their death, except for the fact that neither have laid in a month or two and both seemed to be the most aggressive hens. I am extremely worried- petrified- at the thought of any more dying. WHAT DO I DO?