I have RI's. And one Barred Rock hen> We got 15 chicks and then added a 3 or 4 month old hen and rooster. Things were good for a time being then every few days we would have a one die. We thought at first it was because of the rooster and so we blocked half of the pen off so the little chicks could get away from the rooster. Then ones that were blocked away from him began to die including the 2 turkeys I had with the babies....I have seen no signs of infection or illness. I have seen nothing other than one of the turkeys had saddle legs and had to be put down because he could not stand. I have cleaned my roost and disenfected it but still nothing is a pattern or showing signs of illnes or disesase... We thought maybe the rooster was killing the weak or ill but I am not sure now. His "girlfriend" who we got when we got him died the other day as well and we do not know why.... If anyone has any ideas please send them to me... PLEASE before my last 3 and rooster die!!!! We are feeding Dumor Crumble-Grower level and toss scratch grainsevery few days....their are no signs of sickness. They have all been in same pen for 3 months now.