Johne's disease (pronounced yo-KNEES) is a condition of cattle and all other ruminants (both domestic and wild) that causes chronic diarrhea, weight loss, infertility, and eventual death in animals that are infected years earlier.

Most cattle veterinarians get this phone call from clients often, in some cases daily. The message is: “My cow (calf, weaner, bull) is sick; what’s wrong and what should I treat her with?”

What causes calf scours? As new calves arrive, so does the threat of the common condition known as calf scours or neonatal calf diarrhea.