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Our Doctors


bill-kellner-veterinarian.jpgBill Kellner, DVM

Dr. Kellner is a graduate of the University of Vermont. After college he moved to Colorado where he took up dog sled racing with his five beloved Siberian Huskies. Bonding with his “team” helped to crystallize his passion for animals and his desire to become a veterinarian, so Dr. Bill moved his lead dog, Mokee to Michigan where they attended Michigan State University’s College of Veterinary Medicine.

After graduating with honors from MSU, Mokee gave Dr. Bill the OK to get married and the two of them and Dr. Bill's new wife moved to New Mexico. There, he practiced in a mixed animal hospital on the northern New Mexico Highlands, and after getting kicked by wild range cows one too many times, Dr. Bill decided it was time to focus exclusively on companion animals.

In time, Dr. Bill, his not so new wife, and Mokee moved to Vermont and opened Ark Veterinary Hospital. Dr. Bill and his wife have two kids, and share their home with two dogs and a cat. Bill’s lead dog, the wonderful Mokee, lived to be nearly 18.

Dr. Bill’s hobbies include family time, running (though his wife doesn’t actually call it a hobby, instead using the term “addiction”), and skiing. Dr. Bill has participated in many road marathons, but prefers to run ultra-distance trail races. He has completed several 50 milers and three 100 mile trail races with more on the way!

Dr. Bill is a member of many professional organizations, including the Vermont Veterinary Medical Association, The American Veterinary Medical Association, The American Animal Hospital Association, The American Veterinary Dental Society,  The International Veterinary Academy of Pain Management, and The American Association for Human-Animal Bond Veterinarians.

Dr. Bill is also an Alternate Path Resident in the American Veterinary Dental College (AVDC), an advanced, mentored training program, with the goal of qualifying to take the AVDC's specialist board exam. Dr. Bill provides advanced dental care and oral surgery, including root canal therapy to save broken and dead teeth.

gary-solow-veterinarian.jpgGary Solow, DVM

Dr. Gary Solow was born in New Hampshire and moved to West Virginia as a young child. It is family legend that any small reptile or amphibian that could not out run Dr. Gary usually ended up in a cardboard box or an aquarium. Young Dr. Gary's mother was often reluctant to enter his bedroom for fear of what might be loose! Veterinary medicine was the only career he ever considered. Dr Gary graduated magna cum laude from West Virginia University and then enrolled in the College of Veterinary Medicine at The Ohio State University (OSU).

After graduation from veterinary school, Dr. Gary started his career in the farmland north of Plattsburgh, NY. He lived the “James Harriot” life, taking care of dairy cows (and old time dairy farm families), along with the occasional horse, pig, goat, and llama during his morning appointments, while his afternoons were focused on caring for cats and dogs. After two years of staring across the lake at the lights of Burlington, it was time for a change.

Dr. Gary practiced in Burlington for several years before opening his own veterinary practice in Hinesburg, where he still lives. For many years, his home life involved raising and eventing two horses that were foaled at his farm, as well as enjoying his six cats and three dogs. In 2000, with a young family, and his ever-present “Lynn”, a wonderful Jack Russell Terrier, Dr. Gary was ready for another change and moved with several staff and many wonderful clients to start a partnership with Dr. Bill at Ark Veterinary Hospital.

Dr. Gary enjoys each day with clients, new and old, and he derives great pleasure in having provided excellent care for many families (and now the grown children of those families) over the years in greater Chittenden County area. When not at work, he enjoys a wide range of athletic pursuits including mountain biking, downhill, nordic and backcountry skiing, and hiking, as well as lap swimming each morning in his pond from mid May to early October (seasonal wetsuit required!). He is passionate about the perennial beds that he tends with his wife, Sharon, and can often be found coming to work with an armload of fresh flowers for the office.

Dr. Gary is a member of the American Veterinary Medical Association, the Vermont Veterinary Medical Association and the American Animal Hospital Association. He provides a wide array of healing care with particular emphasis on dermatology, behaviorally challenged pets, soft tissue and orthopedic surgery, cancer care and end of life palliative care.


Dr. Sarah Smets

Dr. Sarah Smets was born and raised in Belgium. There, she first discovered her love for animals surrounded by dogs, horses, sheep, goats and Flemish giant rabbits on her family farm. Before entering the veterinary field, Dr. Sarah received a Master’s degree in History at Ghent University and a Master’s degree in Political Science and Non-Profit Organizations at Suffolk University. During her undergraduate degree she studied abroad for a year in Sweden at Uppsala University. Here she met her husband Anders and he was able to persuade her to move to New England where he grew up.

While working as a fundraiser for MGH and the Animal Rescue League of Boston, Dr. Sarah decided that she wanted to take her love for animals to the next level and chose to start a career as a veterinarian. After commuting across the Atlantic Ocean for several years, she graduated Magna Cum Laude from the Veterinary program at Ghent University with a focus on companion animals. During her studies she participated in many externships, including a month-long externship in the Dental and Oral Surgery Department at UC Davis.

After completion of her degree she passed her US veterinary boards and obtained her ECFVG credentials, which allow her to practice in the US and Vermont. She also participated in a Spay and Neuter program in Mazunte, Mexico; this program reduces the local pet population and promotes the survival of endangered sea turtles that nest on the coast.

Dr. Sarah has relocated to the Burlington, VT area with her husband, her 10-year old Golden Retriever Penelope Waffle and 8-year old foster failure cat Frederick Deuce. Here she enjoys the proximity to the lake and the excellent skiing. Her hobbies include spending time with her family in New Hampshire on Squam Lake and baking way too many cakes, breads and other sweets. A family favorite is her “kattekop” baked apples, a recipe from her home town! Dr. Sarah is a member of the American Veterinary Medical Association, the Vermont Veterinary Medical Association and the Greater Burlington Veterinary Association. She has an interest in Internal Medicine and hopes to apply her knowledge to help chronically ill patients. She is excited to be the newest member of the Ark Veterinary Hospital Staff and she cannot wait to treat the Shelburne area pets with great knowledge and care.

Dr. Koenitzer

Dr. Andrew Koenitzer

Dr. Andrew Koenitzer was born in Milwaukee, Wisconsin and raised in Cedarburg, just north of the city.  He was always fond of the outdoors, and spent most of his childhood summers camping and swimming.  This love of the outdoors led him to attend the University of Minnesota, where he studied Wildlife Management.  While obtaining his undergraduate degree, Dr. Andrew worked at the Raptor Center and the Wildlife Rehabilitation Center, where he realized that treating individual animals was his true passion, so his next step was working at a companion animal veterinary clinic and a dermatology specialty clinic. 

Dr.  Andrew returned to his home state for veterinary medical school, attending the University of Wisconsin-Madison.  He continued to work with wildlife as a technician at the National Wildlife Heath Center, and assisted in research projects studying dog allergy treatments.  He was also active in Wisconsin’s Veterinary Medical Association as the student representative for the Public Education and Marketing Board.

After graduating from veterinary school, Dr. Andrew needed a break from the Midwest winters and accepted an internship in sunny Southern California! In addition to his busy internship, he worked at a marine wildlife and rescue organization.  And even with this busy work schedule, Dr. Andrew was lucky enough to meet his fiancé in California! Together, they moved to Las Vegas, Nevada for two years for his fiancé to complete her medical training. There was no time for casinos! Dr. Andrew worked at a busy practice, helping many pets and developed new areas of expertise in ultrasound diagnostics for his patients.

Five years in the southwest heat was enough for the cold weather born-and-raised Dr. Andrew, so he and his fiancé decided it was time to return to a northern climate and an active, outdoor-minded city.  Burlington was a perfect fit!  Ark Veterinary Hospital was lucky enough to hire Dr. Andrew.  He and his fiancé moved to the area with their two cats, Peter and Bode.  At Ark, Dr. Andrew looks forward to bringing his experience and expertise to providing exceptional care for your pets.  In addition to wellness and preventive medical care, his interests include surgery, dermatology, internal medicine, ultrasound, and dentistry.  Outside of work, basketball and cycling are two of his favorite pastimes.  He hopes to see you at Ark or out on the trails!

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