I had a bottle raised calf that was 3 months old and already weaned. She started foaming at the mouth. Her diet was hay grazer and two feeds for weaning calves. She never acted sick or quit eating and drinking. I gave her 4 1/2 cc of LA 200 the next 2 days. She acted just like always. I found her dead last night. Has anyone ever heard of this? What could it be?