Dr.Jan MacDonald Dr. Jan MacDonald is one of the few board-certified surgeons in Onondaga County. She graduated from Cornell University College of Veterinary Medicine in 1987 and joined Stack Veterinary Hospital as an associate veterinarian in August 1992. In 1994, she was awarded Diplomate of the American College of Veterinary Surgeons after completing a four-year internship and surgical residency at The Animal Medical Center in NYC in 1991. Dr. MacDonald’s special interests are orthopedic surgery and pain management for veterinary patients. She has a dog named Thule, a very smart Standard Poodle.