About Powder Mill Animal Hospital

We Love Pets!

PMAH is a family owned, state of the art full-service veterinary hospital focused on providing exceptional care to the animals in the communities of Acton, Concord, Maynard, Sudbury, Stow, and surrounding towns. Our practice is made up of highly talented veterinary professionals who are passionate about animals and will take care of each pet as if it were their own.  


The PMAH founders started this hospital with a goal to improve the status quo of quality care for animals as well as the full client experience that pet owners demand for their loving pet.

Meet the Team

Dr. Anne Field Best Veterinarian Vet

Dr. Anne Field, DVM

Veterinarian and Owner

Dr. Field earned her Doctor of Veterinary Medicine from Cornell University, and an undergraduate degree in Animal Science from the University of Maine. Prior to starting PMAH, Dr. Field was a veterinarian at the Animal Hospital of Lynnfield (Lynnfield, MA), and at Countryside Animal Hospital (Chelmsford, MA).


Dr. Field is proud to run a progressive animal hospital where clients can feel great about the quality of care their loving pets deserve.  She enjoys educating clients about their pets and is skilled in performing medical, dental, and surgical procedures to dogs, cats, and exotics.

When not working, Dr. Field loves spending time with her family, she has two little girls (Zoe and Abbie) and a Bernese Mountain Dog (Ryder). She embraces an active lifestyle and tries to foster that same joy of outdoor adventures to her children. The family loves hiking, traveling, winter sports, and running.

Dr. Yuan Kang, DVM


Dr. Kang grew up in Acton and always knew she wanted to work with animals and their families. She studied Molecular Biology at Yale University and received her veterinary degree from Cornell University. After practicing for several years in California, she is thrilled to be back in her hometown and part of the Powder Mill Animal Hospital team.


Dr. Kang’s professional interests include surgery, dentistry, shelter medicine and end-of-life care. She advocates for reducing fear and stress in the clinic whenever possible, especially when handling shy cats.


In her free time, Dr. Kang enjoys barre class, hiking, and any reason to get Kimball’s ice cream. She has two guinea pigs (Machu & Picchu) and a rescue Chihuahua (Dobby).

Dr. Yuan Kang Best Veterinarian Vet
Kelli Calo Practice Manager Vet

Kelli M. Calo

Practice Manager

Kelli ​​earned her Bachelor of Science Degree in Health Education and Promotion from Worcester State University. She started her professional career working at a local public health department, eventually becoming the Director of Public and Community Health. 


Combined with her love and appreciation for animals, her previous work experiences have provided her with the foundation on which to build new experiences in the field of animal care as a Practice Manager. She looks forward to creating long-term relationships with clients as we all work together to ensure that the pets you love receive the best care possible and are always treated with kindness, compassion, and respect.


In her free time, Kelli enjoys spending time with friends and family, cooking (even though she admits she is no Gordon Ramsay), and traveling to new places. Some of her favorite places she has traveled include St. Marteen, Honduras, Dominican Republic and Puerto Rico. She lives with her husband and their very spoiled cat, Nori.

Rebecca Maynard

Veterinary Technician Manager, CVT

Rebecca joined Powder Mill Animal Hospital with over 8 years experience in the veterinary industry.  She is a Certified Veterinary Technician, earned her Bachelor of Science Degree in Biology from the University of New Hampshire and studied Veterinary Technology at the Essex Agricultural and Technical High School.


Rebecca is fear free certified and prioritizes making veterinary visits low stress. She enjoys all aspects of surgery, emergency medicine, and senior pet care. Rebecca loves meeting new pet owners and helping educate them on care training. She is excited to bring her knowledge and dedication to pets and their families at Powder Mill Animal Hospital.


Outside of work, Rebecca enjoys spending time with her husband and young son, taking spin classes, and horseback riding. She has a full house with two cats (Martini, and Fluff) and two dogs (Tilia, a Pitbull Mix and Taco, a Border Collie Mix). 

Rebecca Maynard Vet CVT
Jessica Legenza Vet Tech

Jessica Legenza

Veterinary Technician

Jessica is a native of Westford, MA who has been surrounded by animals since a very young age.  Growing up, her parents instilled her with a love of animals; they had dogs, cats, ferrets, birds, and even a skunk!  Jess has a background in biotechnology and started working as a Veterinary Technician in 2007.  Jess has experience caring for dogs, cats, exotic and pocket pets.


Outside of work, Jess is passing on her love of animals to her daughter as they have two cats, a dog, a Russian tortoise, and a ball python.

Marissa Fitzpatrick

Veterinary Technician

Marissa earned her Bachelor of Science Degree from the University of New Hampshire in Zoology, Animal Behavior, and Spanish. After graduation, Marissa completed internships working with marine mammals at Dolphins Plus in Key Largo as well as the New England Aquarium in Boston.


Prior to joining Powder Mill Animal Hospital, Marissa served as a Placement Trainer at Helping Hands: Monkey Helpers for the Disabled where she trained capuchin monkeys as service animals for people living with a variety of disabilities. Marissa’s strong academic background, diverse animal behavior experience and her passion for animal medicine combine to make her a great Veterinary Technician at PMAH.


Outside of work Marissa enjoys exploring Boston with her fiancé and friends and spending time with her cat, Andy.

Marissa Cuda Vet Tech
Rachel Olivera Vet Tech

Rachel Olivera

Veterinary Technician

Rachel earned her Bachelor of Science Degree from Andrews University in Animal Science and Chemistry. She has worked with animals her whole life. She brings 5 years of experience working as a Veterinary Technician to Powder Mill. Rachel takes special interest in all aspects having to do with emergency medicine and surgery. 


Outside of work, Rachel enjoys spending time with her friends and family, snowboarding, and traveling. She lives with her husband, their dog Oscar and two cats Cookies and Melo. 

Ebony Carlson

Veterinary Technician

Originally from St. Paul, MN, Ebony has always been an animal lover. Her dad was raised on a farm and had her riding horses at a very young age. She even took 2nd place in barrel racing at the Minnesota State Fair once. Ebony has been working in the animal care industry since 2013, and started working in Veterinary Medicine in 2018 while living in Nashville, TN. One of her favorite things about working as a Vet Tech is being able to make a positive difference in an animal’s life. 


Outside of work Ebony lives with her husband and their 2 dogs, Dug (boxer/lab mix) and Jesse (Bluetick Coonhound). 

Ebony Carlson Vet Tech
Katie Smith Vet Tech

Katie Winchester

Certified Veterinary Technician

Katie earned her Bachelor of Science Degree in Biology with a concentration in Animal Science from Becker College. She brings 5 years of veterinary technician experience to Powder Mill. She has specialized in emergency and critical care throughout her career and takes special interest in fear free handling techniques. She is low stress handling certified. 


She shares her home with her fiancé and two dogs, Jazzy and Odin, who can play for days on end. Outside of work she enjoys down time with family, the occasional beach trip, and candle making.

Rachel Adams

Certified Veterinary Technician

Rachel has spent her whole life loving animals, all starting from watching The Lion King for the first time.


She graduated from Becker College in 2018 with a Bachelor of Science Degree in Veterinary Science. She is a Certified Veterinary Technician with over four years of emergency and general practice experience. 


Rachel also spent four months studying disease ecology in South Africa and working on a variety of domestic and wild animals. 


Outside of work, she loves spending time with her family, friends and boyfriend. Rachel also has a dog Kruger, and three cats, Nala, Kovu, and Vitani. 

Rachel Adams CVT Vet Tech