So, for the past four months I half had one calf die from suspicious causes. At first I figured it was pneumonia, but these calves have all been perfectly healthy and then they just die before a 24 hour period. I had the most recent one die about thirty minutes ago. This one was very personal for me as she was as loving as a dog and I had no intent to sell her. She is also the only one I've found prior to death. She was lying down, breathing hard and grunting. She was sweating, cold, and her face was swollen around the eyes. She was also foaming at the mouth. I sat down with her and rubbed her side for a bit and then she flipped her head into my lap, rolled her eyes back and died. No physical wounds. I am curious if anyone else has had this issue or thinks they know what the issue is, please let me know. Pneumonia or something different, like someone poisoning my livestock?