Our Veterinarians

MA Vets

The Westover Animal Clinic team of skilled veterinarians welcomes you to our practice. Proudly serving the Chicopee area. At Westover Animal Clinic, it is our daily privilege to provide quality vet care to your cherished pet, with compassion and competence. We hope to ensure a positive impact on our patients, pet owners and the local community.


Stephen B. Constant, DVM, Diplomate ACT

Dr. Constant established Westover Animal Clinic in 1995. Dr. Constant has a Bachelor of Science in Animal Science from the university of Massachusetts Amherst.  He graduated from the university of Florida College of Veterinary Medicine.  Dr. Constant completed an internship in small animal medicine & surgery at Angell Memorial Hospital in Boston.  Dr. Constant became a specialist in the area of reproduction after doing a 2 year residency at the University of Florida.  He received his board certification through the “American College of Theriogenologists” in 1992.


Emily S. Allen, DVM

Dr. Allen joined Westover Animal Clinic in 1999 after working for an Aquatic Animal Diagnostic Laboratory in Maine for 1 1/2 years.  She grew up on Cape Cod and after high school attended the University of Massachusetts Amherst where she earned a B.A. in Psychology.  Dr. Allen then graduated from Cornell University College of Veterinary Medicine in 1997.  She shares her home with her husband, son, and 2 cats, and, when not at work, enjoys reading, being outdoors, and working in their garden.


Lisa M. Weppner, DVM, CVA

Dr. Weppner joined Westover Animal Clinic in 2005. Dr. Weppner has a B.S. in Biology from Florida State University. After graduating from the University of Florida College of Medicine in 1992, she worked in practices in Florida and Maryland. She was certified by the International Veterinary Acupuncture Society in 2001.

Bonnie J. Smith, DVM

Dr. Smith is a graduate from Tufts University, Cummings School of Veterinary Medicine. While there, she trained faculty and staff on appropriate use of ventilators and other respiratory equipment. Since then she has treated horses, dogs, cats, ferrets, rabbits, cows, goats, sheep, llamas, alpacas, small pocket pets, birds, a macaque, and a few chickens. She also has a Bachelor of Science degree in Biology from Montclair State University, and an Associates degree from Bergen Community College in Respiratory Therapy. She has special FEMA/DHS training in disaster and agricultural response. When operating her large animal practice, she spoke on many occasions to organizations and other groups on a wide variety of topics, including disaster planning. When the tornado hit our area of Massachusetts in June 2011, half her practice area was affected and she assisted all emergency operations in her local communities. The Massachusetts Veterinary Medical Association’s Executive Board and Advisory Board is where Dr. Smith volunteers most of her professional time. Currently she is the Secretary of the organization and also serves as the Chair of the Communicable Diseases and Public Health Committee. She has served as Chair of the Large Animal Committee, Chair of the Ethics and Grievance Committee, and a member of the Education Committee. Dr. Smith is also recently involved with the American Veterinary Medical Association’s “One Health Initiative” which joins wildlife, human and domestic animal medical and infectious disease disciplines. Dr. Smith’s personal interests include outdoor activities like birding, hiking, canoeing, riding her horse, and staying physically fit. All her extended family members own animals of all sorts, and a few farms as well. She is an avid reader and has even digested The Origin of Species and The Wealth of Nations, although fiction is always a fun read.