Who does a cow call when she's sick? Large animal vet John Fetrow, otherwise known as Dr. Moo! John works at the University of Minnesota's Cow Transition Management Facility, where he researches the birth cycle of cows. He is an expert on common cow diseases, what kinds of food and care cows need to remain healthy (including "cow pedicures"!), and even the best kind of bedding for sleepy cattle!