This morning I went to let my chickens out for the day and my 5 month old leghorn roo was laying dead in the pen. No injuries, no feathers missing, just laying dead like he went to sleep. I just went to check on them and one of my hens was laying inside the pen dead. When I picked them up they are heavy and healthy. In fact the hen that I just carried out looked like her feathers had dust in them like she just finished taking a dust bath and walked into the chicken house and died. Help! I have no idea what is causing it. There have been no signs of illness at all. Just sudden death. I have no vet close by that knows anything about chickens. What do I do? Could it be the heat? It is cooler today than it has been and they are allowed to range all day so they have plenty of places to get cool. PLEASE give me some suggestions. I am in central Illinois and I would send the dead hen off to be checked but I don't have any idea where to go with it.