Our Veterinarian Team Hampden, MA

Stephen B. Constant is a board-certified reproductive specialist serving western Massachusetts. This specialty includes all species. Dr. Constant has been practicing small animal (dog /cat/ exotics) reproduction out of the Westover Animal Clinic since 1995 doing surgery, ultrasounds, infertility work-ups, and trans-cervical and surgical inseminations. Dr. Constant has traveled to many countries teaching and volunteering with CVM (Christian Veterinary Missions), as well as other organizations. He has worked in Vietnam, Haiti, Honduras, Jordan, as well as home in the United States on Native American reservations.

His large animal (Horses, sheet/goats, camelids, exotic animals) clients include zoos, research facilities, and specialty farms.

A 1992 graduate of Cornell University College of Veterinary Medicine, Dr. Peck has owned the Hampden Veterinary Clinic since 1999. At the Hampden Veterinary Clinic, Dr. Peck strives to provide high-quality and affordable pet care in a compassionate, personalized manner.

Her special interests include wellness and disease prevention, dermatology, and long-term care of geriatric pets.

An avid life-long horsewoman, Dr. Peck owns, rides, and shows Arabian horses.

Dr. Devlyn D’Alfonzo attended Ross University Veterinary School and then Chi Institute for her veterinary and acupuncture training. Senior pets hold a special interest for her in her veterinary practice. She is a native Virginian who moved in June of 2025 with her family to central Massachusetts.

In her spare time she enjoys time with her family, gardening and horseback riding. She is also a one time novelist, and avid reader.

Dr. Bonnie Smith shared the equestrian life with the women in her family. This inspired her to become a veterinarian which combined her passion for science and the love of horses. She worked her way through college as a respiratory therapist in NJ to get her A.A.S. and B.S. degrees. Later she graduated from Tufts University Cummings School of Veterinary Medicine with her Doctorate in Veterinary Medicine (DVM) degree. She has cared for humans, horses, cattle, goats, sheep, llamas, alpacas, donkeys, pigs, birds, hamsters, guinea pigs, rats, ferrets, rabbits, dogs, and cats.

Dr. Smith has always valued educating clients and veterinarians. Volunteering for 25 years at the Massachusetts Veterinary Medical Association (MVMA), she’s chaired numerous committees and has been on the board of directors most of that time. It has been an outlet for many diversified interests. Becoming the president of the MVMA in March 2020, during the Covid 19 pandemic, has been her highest achievement so far.

She joined our practice in May 2023 and her special interests are One Health, pulmonary medicine and infectious diseases. Fun Fact: She’s read both “The Origin of Species” and “The Wealth of Nations”. She loves spending time with family and enjoys art, music, hiking, birding, or being at any beach.