About Callanan Veterinary Group
The oldest family-owned private veterinary hospital group in America.
“We are devoted to providing the highest level of medical care through a full spectrum of advanced and proven techniques with an emphasis on exceptional client services.”
1926–2026
100 years of caring for your family's pets
2026 marks 100 years of the Callanan Veterinary Group. Four generations of one family have cared for the animals of Massachusetts and Rhode Island, and the people who love them.
A century of the Callanan family
- 1926Toureen Boarding KennelsP.J. Callanan and Dr. Bourke found Toureen Boarding Kennels in Brighton, Massachusetts.
- 1976Brighton Animal HospitalP.J.'s son Kevin Callanan, MRCVS, expands the family business with Brighton Animal Hospital.
- 1991Neponset Animal HospitalP.J.'s brother Tommy and nephew Joe open Neponset Animal Hospital, just over the Quincy line in Dorchester.
- 1994Union Square Veterinary ClinicThe family expands into Somerville, headed by Dr. Kevin and Dave Ahearn. Today it's Somerville Veterinary Center.
- 2003R.I. Animal Medical Center + Four PawsDr. Kevin's son Charles brings the family into Rhode Island with a 13,000 sq ft full-service facility.
- 2006Massachusetts Animal Medical CenterBrighton Animal Hospital is fully renovated and renamed Massachusetts Animal Medical Center, headed by Dr. Kevin's sons Charles, Neil and John.
- 2016RenovationsUnion Square is completely renovated, adding orthopedic surgery and grooming. Neponset Animal Hospital gets an exterior facelift.
- 2022Wellington Circle Veterinary CenterOur newest hospital opens in Medford, led by Dr. Jon Callanan.
- 2026100 yearsThe Callanan Veterinary Group celebrates its centennial: four generations of one family, five hospitals.
Clinical leadership
Dr. Jon Callanan, Chief Medical Officer
A Holy Cross graduate and former captain of its men's ice hockey team, Dr. Callanan played abroad for two years before joining the family practice. Like his father before him, he earned his MVB from University College Dublin, graduating in 2008. He lives in Waltham with his wife, two children and their dog, Dublin, and spends hockey season in rinks across Massachusetts coaching his kids.
Giving back
The Callanan family supports The Wolf School in East Providence through the Kev Classic, a memorial golf tournament for Kevin Callanan.