Dr. Rachel Keyser, D.V.M. at Winter Harbor Veterinary Hospital with IlseDr. Rachel Keyser hails from Bourne, Massachusetts on Cape Cod.  She received her undergraduate degree from Bowdoin College in Maine and graduated with honors from Tufts School of Veterinary Medicine in 1997.  She is currently licensed to practice in New Hampshire, Maine, and Massachusetts, and is also a member of the American Veterinary Medical Association and the New Hampshire Veterinary Medical Association.  Dr. Keyser purchased Winter Harbor Veterinary Hospital from Dr. Wing in January of 2018.  She hopes to continue the hospital's great service to the community and its pets.

After graduation from veterinary school, Dr. Keyser started as a mixed animal practitioner, treating everything from dogs to horses and cows.  She now concentrates on treating primarily dogs and cats, with a few "pocket pets" thrown in.  She started working at Winter Harbor part-time in June 1997 and after a few years, became a full time associate and now, the new owner.

When she's not working, Dr. Keyser fills her time with activities with her two young daughters, Grace and Hope, and her German Shepherd, Raina. Last year they added a new member to the family - Trigger, a handsome orange tiger cat.  They currently reside in Moultonboro.  Rachel is an avid runner, but also finds time to squeeze in a Spin or Kick-boxing class.  Her hobbies include gardening, scrapbooking, cooking, and spending time with her girls at the beach – lake or ocean.


Dr. Sandra M. Wing, D.V.M. at Winter Harbor Veterinary Hospital with TrekkerDr. Sandra Wing was born and raised in Hastings-on-Hudson, New York, a small suburb north of NYC. She attended the Colorado University in Boulder, Colorado where she fulfilled pre-veterinary requirements and received a Bachelor Science degree in Recreation. After a 2 year hiatus living in Vail, Colorado, she attended Colorado State University in Ft. Collins, Colorado where she earned a Bachelor of Science degree in Veterinary Science and a Doctorate degree in Veterinary Medicine in 1982.

After receiving her DVM degree, she practiced small animal medicine in Durham and Chichester, New Hampshire, and the River Cove Animal Hospital in Williston, Vermont. In 1986, Dr. Wing established the Winter Harbor Veterinary Hospital in Wolfeboro, a town and community that she is proud to call her permanent home.

Dr. Wing is licensed to practice veterinary medicine in New Hampshire and Maine. She is also a member of the American Veterinary Medical Association and the New Hampshire Medical Veterinary Association. She is dedicated to the care of companion animals (and their owners!) and appreciates the rewards that this can bring all involved.

When not hard at work as a veterinarian, Dr. Wing can usually be found outdoors hiking with her Golden Retriever, Trekker, or bicycling. On snowy, wintry days, you may catch her out plowing the parking lot in her red and white Jeep Wrangler. Her other interests include sailing, waterskiing, traveling, long distance bicycle touring, skate skiing, and photography.


dr geoff clark with patient at winter harbor veterinary hospitalDr. Clark is a 1986 graduate of the University of California Davis School of Veterinary Medicine.  He completed an internship at the Animal Medical Center in New York City and then completed a residency in Small animal surgery at Tufts University School of Veterinary Medicine.  Dr. Clark became board certified in surgery in 1992 and became a staff surgeon for 5 years at the Animal Surgical Clinic of Seattle.  Upon returning to the Northeast in 1996, he joined the staff at Dover Veterinary Hospital in Dover, NH.  In 1999, Dr. Clark started Veterinary Surgery of New England, a mobile surgical referral practice based in Durham, NH.  He provides on-site orthopedic and soft tissue surgery services at veterinary hospitals in NH, southern ME and northeastern MA.  He has also been providing surgical services at the Capital Area Veterinary Emergency Service.  Dr. Clark provides surgery services on our orthopedic and complicated soft tissue cases at Winter Harbor Veterinary Hospital as needed.

Dr. Clark resides in Durham, NH with his wife, Mary, and daughters, Olivia and Juliet.  Their home is shared with two cats named Simba and Apollo, an English Setter named Willow, and Francis the Wonder Pug.


mary ellen smallidge technician with brooke at winter harbor veterinary hospitalMary Ellen grew up in New Jersey. She started her career in the animal field as a groomer at the age of 15. She attended college in Massachusetts, graduating with an associate degree in Animal Science in 1985. Following this accomplishment, she worked at a humane society for 2 years grooming animals for adoption. In 1987, she moved to Wolfeboro and joined the Winter Harbor Veterinary Hospital when it was still in its infancy and has been with us ever since. Mary Ellen has become an experienced veterinary technician and an intricate part of the day to day operations of the hospital. She does all of the purchasing for the clinic but most of all, enjoys making a difference in the lives of owners and their pets by being there for them when they need it the most. After almost 30 years, she still loves her job. If you need a shoulder to lean on, you can always count on Mary Ellen.

Mary Ellen lives in Wolfeboro with her husband, Scott, her son, Austin, and Brooke, a black Lab.  She also has a grown stepson, Wes, who lives nearby with his family.   In her spare time, she enjoys gardening, shopping and her newest endeavor is her flock of six chickens.  It's life's simple things that make her happy.


Becky White, Veterinarian Technician at Winter Harbor Veterinary Hospital with HankBecky joined the staff at the Winter Harbor Veterinary Hospital in 1997, after graduating from Kingswood Regional High School.  Since that time, she has become skilled as a veterinary technician and is a very familiar face to all our clients.  She especially likes to assist in surgery and anesthesia.

After working here for so many years, she has had many animals come in and out of her personal life, often as rescues and adoptions.  Becky's "zoo" has consisted of 7 cats, 3 dogs, a tortoise, ducks, chickens, geese, rabbits, a hamster, guinea pigs, a ferret, donkeys and goats.

Currently, Becky lives with Haley, her 15 year old "human" daughter and Wyatt, her 11 year old "human" son.  When not at work, Becky enjoys hiking the "4000s," scrapbooking, exercising, running, and spending time with her children.


sheri martin technician with cam at winter harbor veterinary hospitalSheri joined the Winter Harbor staff in 2014 after graduating from the University of New Hampshire with an Applied Associate in Animal Science. She also obtained her Bachelor degree in Psycology. Sheri is obsessed with her dog, Cameron, and does everything with him. She also has two rabbits, fish, and a crazy cat she adopted after it was found as a stray. In her free time she enjoys hiking, gardening, reading, and attending yoga class. Her sense of humor is a welcome addition to the hospital.



amanda chase technician with uli and trillium at winter harbor veterinary hospitalAmanda Chase is a native of New Hampshire, originally from Hampstead. She graduated from Derryfield School in Manchester and attended Virginia Intermont School in Virginia and the University of New Hampshire Thompson School, where she graduated with an associates degree in Applied Animal Science in 1985. She moved to Ossipee in 1986 and eventually to Wolfeboro with her two daughters in 2000. Amanda has been at the Winter Harbor Veterinary Hospital since 2001. Because of Amanda’s extensive retail history, she loves to be at the front desk helping clients. You can always count on her to give you a call to follow-up on how your pet is doing. Her easy going approach to life, caring attitude, and attention to detail make her an important part of our team.

A lifetime animal lover, Amanda has had horses, goats, and chickens in the past, and is now the proud owner of Uli, a fun-loving yellow lab, and a cat, Louis, who can open any cabinet door and joins her for toast every morning at the breakfast table. In her free time, Amanda enjoys spending time with her two grown daughters, Hannah and Rachel, as well as her “grandpuppy”, Nikita, all 4 pounds of her!! Kayaking is one of their favorite pastimes together. In addition, she loves to hike with Uli and her friends (human as well as canine!)

Mascot Emeritus

Trek, Official Mascot of Winter Harbor Veterinary Hospital in Wolfeboro, NHTrek emerged on the Winter Harbor Veterinary scene in September 2010. He came from a litter of 14 Golden Retrievers of which only 2 survived. Ever since then, he has demonstrated his will to live by enjoying life to its fullest every day. As the staff says, “he is wired for sound!!”. He is now a fixture at the hospital and our official greeter.

Trek’s hobbies include chewing on toilet paper, collecting his master’s shoes and hoarding them in his bed, digging holes, collecting wood from the forest to add to his stick collection, and chasing his tail. He is passionate about hiking, running , swimming and diving. In fact, he has quite a fan club that admires his “leap of faith” off the dock.

When not at play, Trek is hard at work just being himself as the Clinic mascot. He is extremely entertaining and keeps both the staff and our clients amused and in good humor. He can be seen “testing his boundaries” regularly, “crossing the line” behind the front desk to “meet and greet” everyone.