calf diarrhea

What Causes Calf Diarrhea? Rotavirus, coronavirus, bacteria (K99 E. coli; Clostridium perfringens Type C, Salmonella spp.) and parasites (cryptosporidia, coccidia) are the most common causes of neonatal calf diarrhea. How do I stop my calves from having diarrhea? Probably the best thing producers can do for calves with diarrhea is provide a good oral electrolyte.