The other day I found a calf doing the strangest thing. When I would walk up close to the calf, he would fall over stiff legged on his side, almost paralyzed for 30 seconds to a minute. Then slowly he would begin to collect himself and stand back up. If I began to walk toward him he would get scared and do it again. This seizure seems to be triggered by fear or excitement. I have never seen this before in cattle. Does anybody know what this might be?