We have 30 or so roos we are raising for meat chickens. They are 2 months old. Yesterday morning I went to clean the coop and in the corner were 2 dead roos and another one that didn't look well at all! While I was cleaning the coop the "not well" one died. I pondered it all day and checked on them frequently throughout the day and the rest seemed fine and they were all in and out of the run all day. Went to close the chicken door last night and they were all fine. This morning I go to check on them and there is another one dead, two that didn't look well. Now I am freaked that is 6 Roos in 2 days. I called McMurray to see if they could tell me anything which they couldn't. I then called the vet and took the Roo to the vet to have him see if he could see what was going on. I haven't heard from him yet. The Roos look fine. Have all the feathers, they haven't been attacked. I dont' see any bloody poop. It has gotten chilly the last few nights but if they are smothering each other I would guess that the small ones would be the ones to not survive. These are all the bigger Roos. I just can't figure out what would be wrong. One day they are perfectly healthy and the next they are dead. I am not sure what breed they are. We got a mix but it is all the same breed at this point. I had them on medicated starter but then they got put in the coop and run about 3 weeks ago I switched them to scratch. After reading this site I switched the scratch to laying pellets beings we have 3 older laying hens in with them right now. Anyone have any ideas? At this rate they will all be dead by the end of the week.