HI ALL I have about a half acre with a 6 foot high chainlink fence for my chickens and turkeys to free range on. I have about 25 hens mixed polish,and heavy laying types and 9 turkeys and 1 silkie rooster and 3 polish roosters in the pasture. All where hatched in march of 2010 and raised together. All have been doing fine together until today. I went out to the coop today and the 3 polish roosters were dead. No sign of why they died. No blood No nothing!!! I have had them on start and grow which is a high protein feed since hatched. Two or three days ago I filled 2 of my 3 feeders with a layer mash and 1 feeder with the regular start and grow feed. Could the change in feed have killed them?Could the turkeys killed them but with no blood?!?. Something else? Help! any idea? I am thinking the feed.