January 6, 2008 | 12:00 a.m. CST
Elaine Walker, far left, Dr. Tessa Marshall, third from the right, Autumn Dunivan, second from the right and Derek Caudill, farthest right, look on as Bob Walker, Elaine's husband, pushes a sickly calf from its house. About every other week, students from Mizzou's school of veterinary medicine come out to the Walker farm to help immunize and look after the calves.