VCA Roberts Animal Hospital

Mary Reynolds Callahan, DVM, Medical Director

DVM, Tufts University


Dr. Mary Reynolds Callahan is a 1988 graduate of Tufts University School of Veterinary Medicine. She has been in clinical practice at VCA Roberts Animal Hospital in Hanover since August of 1988. Dr. Reynolds Callahan is currently Medical Director of our practice. Her professional interests include wellness, preventive health care (vaccines, nutrition, and dental health care) and geriatric medicine. She routinely sees general clinic appointments 3-4 days per week and has one general surgery day per week that includes procedures such as spays, neuters, abdominal exploratories, tumor removals, and dental procedures.
Dr. Reynolds Callahan lives in Scituate with her husband, Kevin, two dogs and two cats. Dr. Reynolds Callahan is a native of Maine and maintains a family home on an island there. Her interests include boating, reading, and hiking with her dogs at local parks and trails. Above all else, she enjoys spending time with her family and is her grandsons' biggest fan at all their local sporting events!


Specialty Care

Sometimes sick or injured pets need the care of a veterinary medical specialist. When that happens, VCA specialty hospitals work closely with the general practitioner veterinarians who refer cases to us in order to provide seamless veterinary care to your pet. When your pet is facing any kind of serious illness or injury, our specialty referral hospitals will provide the compassionate and expert care your beloved pet needs.

Our goal is to make sure that when you and your pet are in need that you have access to board certified specialists who are up to date on the very latest developments in their field. In our state of the art hospitals, our specialists also have access to the most sophisticated diagnostic and treatment tools and techniques from ultrasonography and endoscopy to CAT scans and even MRI.

As part of the VCA family, we have over 83 specialty hospitals across the US and Canada which provide referral specialty care, so there may be one near you. Our specialized services include: behavior, cardiology, critical care, dentistry, dermatology, integrative medicine, internal medicine, neurology, oncology, ophthalmology, radiology, rehabilitation, reproduction, and surgery.

Find a VCA Specialty Care Animal Hospital near you:


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Emergency Care

 VCA Roberts is open until 10pm seven days a week. Walk-ins and urgent care appointments are seen in order of arrival or on a critical needs basis. In case of emergency, please call us immediately, 781-826-2306.


After 10pm please contact or go directly to VCA South Shore Hospital in Weymouth.
VCA South Shore   781-337-6622

VCA South Shore is located at 595 Columbian Street in Weymouth and is open 24 hours a day for emergencies.