Veterinary Team

Meet Our Veterinary Team

Meet the Veterinarians & Team of Mill Brook Animal Clinic! We’re pleased to provide exceptional vet care for your pets!

dog wearing a cap

Get to know our veterinary team!

We are solely dedicated to your pet’s care! We look forward to getting to know you, and we hope you’ll take the time to scroll down and get to know us.

Dr. Jan Jeffers


Dr. Jeffers was born and raised in the central coast area of California. She attended UCLA before moving to Massachusetts. At UMASS Amherst, Dr. Jeffers received an M.S. degree in nutrition, then went on to Tufts Veterinary School, graduating in 1989. Dr. Jeffers has worked in general medicine as well as in behavior medicine. She joined Mill Brook in 2013, continuing her interest in behavior medicine, especially in starting puppies off right, helping owners problem-solve, and improving the pet-family relationship. Dr. Jeffers and her family have lived in Arlington for 25 years. In addition to veterinary medicine, Dr. Jeffers enjoys being outdoors (walking, biking, gardening) and volunteers in food rescue and at a homeless shelter.

Dr. Kevin Fallon (Retired)


Born and raised in Arlington, Dr. Fallon earned his bachelor’s degree from St. Michael’s College in Vermont and completed graduate work at UMASS School of Agriculture. He then earned his Doctor of Veterinary Medicine from the University of Pisa in Italy. Upon graduation, Dr. Fallon returned to the US to practice both equine and companion animal medicine. This took him as far south as Florida and Georgia and as far abroad as Thailand Royal Bangkok Sports Club-Polo Club. In 1994, Dr. Fallon returned to Arlington to start Mill Brook Animal Clinic. Since founding the clinic, Dr. Fallon has continued to keep up to date with the latest advances in veterinary medicine and has expanded his focus to include more holistic practices, completing the International Veterinary Acupuncture Society’s Program in 1999 and a course in veterinary orthopedic manipulation in 2000. Dr. Fallon’s interests include dentistry, general surgery, and Italian cuisine.

Dr. Kristian Sorbo


Dr. Sorbo joined Mill Brook in 2022 as the medical director. He has over a decade of experience in small animal medicine and surgery. He is an accredited veterinary dental practitioner and serves as an instructor for the International Veterinary Dentistry Institute. Besides oral surgery and dental care, Dr. Sorbo has a special interest in sonography, general surgery, and emergency and critical care.

Native to Norway, Dr. Sorbo’s interest in veterinary work started with his annual summer job milking dairy cows. He later moved to Scotland to obtain his veterinary degree, followed by a decade of veterinary work in the UK and the US.

When not at work, Dr. Sorbo enjoys his time off with his wife, young son, and their cat, Sophie Spitfire. When time allows, hiking, skiing, and biking are high priorities on their free time agenda.


Veterinary Assistant

Nicole is a recent graduate from the University of New Hampshire, where she earned her Bachelor’s degree in Animal Science. Although Nicole has a soft spot for cats, her favorite species to work with is the cow. She has also worked with poultry and other farm animals and is always willing to step foot into a barn. Nicole is currently in the process of applying to veterinary school, and despite a primary interest in large animal medicine, she is open to all avenues of the profession. Outside of work, Nicole enjoys spending time with her feline friend, Betka, playing Dungeons and Dragons, and playing video games.


Veterinary Assistant

Dylan has always loved animals. In pre-school, his teacher, a former zookeeper, who owned a farm, taught Dylan how to care for her farm animals. It was hard work, but he enjoyed it and continued helping until graduating from high school. After high school, Dylan attended Skidmore College and graduated in May 2020. His undergraduate work included applied and theoretical mathematics. After graduating from Skidmore College, Dylan started veterinary school at St. George’s University in Grenada, West Indies, where he will be entering his second term. During his winter and summer vacations, Dylan works at Mill Brook Animal Clinic in Arlington, Massachusetts. In his free time, Dylan loves to work out and cook great meals. He also enjoys watching Netflix with Baxter, the geriatric cat he rescued when Baxter was thirteen.