John E. Madigan, DVM, MS, Dipl. ACVIM,is a professor in the department of Medicine and Epidemiology at the School of Veterinary Medicine at the University of California, Davis. His areas of expertise include equine welfare, equine helicopter rescue, trigeminal mediated headshaking, potomac horse fever, anaplasma infection in horses and humans, veterinary emergency response, and equine veterinary education. He is also interested in neonatal medicine; his book, Manual of Equine Neonatal Medicine, is available in the fourth edition of the text.