Today my wife and I came home to 8 dead meat birds in our 4x8 chicken tractor, they were approximately 2 months old. We fed them less than 24 hrs ago, their waterer was still full. 1 had been mutilated however the other 7 were un touched, I believe the mutilated one may have possibly been mutilated after it died. All 8 of them were scattered around the perimeter of the cage. What on earth would cause all 8 to drop dead overnight? The only thing out of the ordinary we have done in the last day was feed them some watermelon rinds, which I do all the time with our egg layers.