I have been feeding Universal Turkey crumble for a very long time. I bought 9 bags last week. I feed about 70-80 pounds a day. 4 of the bags looked very different. They looked like they had a brown mineral like powder or vitamins or something in them. I should not have feed them when I noticed they looked different. I was to buzy to go to the feed store to take them back. I feed them thinking they would not hurt them. I am 99% sure the food has killed 10 adult birds in 24 hours, and it looks like I will lose more. I have almost no symptoms until either I find them dead or they are about to die. Does that sound like it is toxic. My feed store was saying they had no complaints then one of the kids that loads my food told the owner I am the only one that buys turkey feed. Is anyone else feeding this and having a problem? My empty bag says it was made 6/24/10. I have never seen anytghing like this. One minute they are fine. Next time I look they are dead. The only weird thing, is none of the younger birds have died.