I was just wondering if anyone has had this happen to them, this was a first for me. I had a 8 wk old calf that was running, bucking, kicking, eating creep feed and drinking water one day then the next he was down. Got him up and moved him and his mother to a holding pen so I could keep an eye on him. He seemed to be favoring his left hind foot so I thought he had hurt his foot, got him down and checked it out no footrot, no swelling anywhere, nothing seemed wrong, but within 2hrs time he was laid out on his side and stiff as a board , he was still alive but he would not even try to get up. I called my vet and he told me to give him a shot of Benamine which I did. He was not slobbering, he had no labored breathing, he had normal bowel movement, he was not bloated, he had nursed his mother twice while I was watching him. He died within 12hrs time. Anyway I was just wondering if this has happened to anyone else. And what the heck it could be.