Upon completion of his residency, Dr Robert McDonald joined the faculty of Mississippi State University where he worked for 8 years as a Small Animal Medicine clinician rising to associate professor in 1990. In 1993 he joined Starkville Veterinary Hospital where he worked as both a general and referral practitioner for 5 years. He also operated an Internal medicine/Dermatology referral service in Memphis (TN), Jackson (MS) and Springfield (MO). He joined Antech in 1998.