vet-team
The Sugar River Animal Hospital is proud to introduce our clients to our incredible veterinary team! Our highly-trained team members have been hand-picked to provide the most exceptional care possible to our patients. We invite you to scroll through our bios to learn more about our team members. Have questions? Contact us today and we’ll be happy to assist you!

Veterinarian: Dr. Catherine MacLean

Dr. Catherine MacLean

Dr. MacLean completed her Bachelor of Science from Penn State University, her Doctorate of Veterinary Medicine from Atlantic Veterinary College, and her pet acupuncture certification from Chi Institute. Her areas of special interest include general practice and acupuncture. She opened Sugar River Animal Hospital in 2013, and she has been practicing veterinary medicine since 2010. Dr. MacLean’s family consists of her husband Matt, her daughter Katarina, her son Alexander and their three pets: Jack and Misty, two cats, and Arrow, a dog. When she isn’t working, Dr. MacLean enjoys skiing, cooking, reading, gardening, and spending time with her family and friends.


Veterinarian: Dr. Peterson – Internal Medicine Specialist

Dr. Erik Peterson is a Board-Certified Veterinary Internal Medicine Specialist that we work closely with. Dr. Peterson performs echochocardiographic and ultrasonographic studies and procedures for us as well as internal medicine consultation for some of our more difficult medicine cases.


Veterinarian: Dr. Andrea Brown

Dr Andrea Brown received a BS in Biology from Samford University in Alabama and a MSc One Health (Infectious Diseases) from both Royal Veterinary College and the London School of Hygiene and Tropical Medicine. She studied Veterinary Medicine at Auburn University. Andrea has over 20 years of local experience with our pets. She lives locally with her family and many assorted pets.


Dr. Lisa Colgan

Veterinarian: Dr. Lisa Colgan

Dr Lisa Colgan received her Bachelors of Animal Science from the University of New Hampshire, and her Doctorate of Veterinary Medicine from The Ohio State University in 2001. She grew up in Sunapee and returns to us after practicing in the Boston area for 15 years. She is proud to integrate both Eastern and Western medicine when she works with her patients. When helping our pets she loves to spend time outside running and hiking with her husband Quinn and her two dogs Davin & Cricket.


Technicians and Client Care Coordinators

sarah-dileySara Diley, CVT
Sara started out at U.V.V.S in 2005 and worked her way through to become a veterinary technician. She attended Vermont Technical College and graduated in 2010 with a degree in Veterinary Technology. She passed her VTNE to become certified 3 months later. Sara continued her work at U.V.V.S for a number of years and also held the head technician position, later becoming the Secretary of the Vermont Technician Association

She then moved to Newbury Veterinary Clinic in Newbury, VT, and loved walking dogs and providing care to her patients. A year and a half later her husband got a job for a wind turbine company in Lempster, NH and now has found a home working at Sugar River Animal Hospital.

She currently has 2 Boston Terriers, a Great Dane, a cat, 6 chickens, and a Nile Monitor. She loves all creatures and being outdoors. She enjoys helping out as much as possible whether it be human or animal. She is a generally sunshiny person to be around and you will often find her with a smile.


sarah-dileyKate DelGrosso, CVT
Kate DelGrosso, CVT has an eclectic education starting with a BA in English and an MA in Literature. After several years in corporate America working for various publishing houses, she quit her job and went back to school while working nights in a 24 hr Emergency Referral Animal Hospital in Indiana. After 6 years, she finished an AAS in Veterinary Science and passed her VTNE board exam in 2007. She is excited to be back in vet medicine after a hiatus spent raising her two-legged children to elementary school age. Kate has special interests in dentistry, canine training, canine reproduction and physical therapy/rehabilitation.

In her spare time, she can be found roaming the foothills with an assortment of collies, showing her dogs in most AKC sports and driving the mom taxi to and from every soccer, baseball or dance event this side of Concord. She is supported in all her endeavors by her husband, two children, two cats, all the Gateside collies and a small flock of chickens.


Kelsey BarkerKelsey Barker, Veterinary Assistant
Kelsey became part of the SRAH team after completing her BA in Biology at Colby-Sawyer College in May of 2017 and after completing her internship with the animal hospital. Although new to the field, Kelsey is quick and excited to learn how to help owners as well as their faithful companions. Kelsey has lived in New Hampshire her whole life, enjoying playing soccer and riding horses. When she was young she enjoyed being a part of her horse 4-H group, and spending as much time riding horses and being with her dogs as possible.

Kelsey currently enjoys her two dogs, Tucker and Tallie, her horse, along with two parakeets and a bearded dragon. When she has free time, she enjoys going for hikes with the dogs, and training her young horse Edie.


Sierra BishopSierra Bishop, Technician
Sierra has been a veterinary technician for 8 years. She joined the Sugar River Animal Hospital team in October 2017. Sierra currently resides in Canaan, New Hampshire with her husband, daughter and stepdaughter. She has her own little mini farm with four dogs, five horses, two cows and multiple chickens. Sierra enjoy horseback riding, hiking, fishing, hunting, and many other outdoor activities. Sierra and her family also really enjoy spending time together at our summer home in Canada.


Paula GallienPaula Gallien, Client Care Coordinator
Paula joined the Sugar River Animal Hospital Team in September 2017. She grew up and went to school in Massachusetts and was employed in the Business/Administrative/Customer Service field in the Boston area where she met her husband Chris and relocated to his hometown of Grantham, NH when they got married. She originally worked for a large oil company in the Upper Valley when she first moved up here, but Paula’s love of animals and their owners drew her into the veterinary science world around 10 years ago. She cannot imagine ever wanting to work anywhere else! Paula enjoys spending time with her family, friends and dogs Jasmine & Stroker.


Olivia (aka The Boss)

Olivia joined the team in 2014. She doesn’t like to talk about her past, but will say that she is grateful that Dr. Catherine wouldn’t allow her to be euthanized. Olivia’s primary purpose in life is to be worshiped like the god that she knows that she is and to make sure that all humans know that they are here to serve her. In her spare time she keeps all dogs in line that come to visit the hospital, tries to convince everyone that she is starving (all the time), people watching and lounging around the clinic. Her favorite places to dictate the world from include, but are not limited to the front desk, the windows and benches in reception, the futon in the staff room and her window perch in Dr. Catherine’s office. For fun Olivia likes to knock the phones off the hook, try to get in your lap when you need to get up or are super busy, to sit on Dr. Catherine’s lap with her face squeezed between her hands while she is typing and of course napping.