what happened?? perfectly healthy six year old cow nursing 2 week old calf found down in the pasture with no previous signs of ill health. moderate to severe bloating present before death, bloody/red vaginal secretions at time of death, labored breathing, inability to move any part of body. the longest she could have been sick is about a day and a half. death occurred within 2 hours of cow being found down in the pasture. can anyone tell me what could have happened? i need to know if other cattle are at serious risk. please help me.