Dr. John Zettelmoyer received his Bachelor of Arts degree in 1968 from Lycoming College. He received his Masters of Science degree in Veterinary Public Health – Epidemiology, from Texas A&M University in 1977. He received his Veterinary Degree from Texas A&M University in 1980. Dr. Zettelmoyer rejoined Rockhill Veterinary Associates in 2008.

Dr. Zettelmoyer has a special interest in orthopedics and physical rehabilitation. He attended the Canine Rehabilitation program at the University of Tennessee, College of Veterinary Medicine. He served in the United States Air Force as an instructor pilot for six years. When not practicing veterinary medicine he enjoys time with family and has volunteered as a staff member for the Quakertown High School Marching Band for over 20 years. His other interests include: skiing and fly fishing.