Dr. Brett Gaby

Dr. Brett Gaby graduated from Cornell University in 1992.  Following graduation he spent 2 years in immunological research at the Cornell College of Veterinary Medicine, under lead investigator Neil Norcross (collaborator on the Coggins test developed at Cornell).  During this time Dr. Gaby was competing at the national level in rowing.  He was sponsored by the New York Athletic Club with whom he won several championships including national titles.

In 1994 he moved to Dublin Ireland to study veterinary sciences at the University College Dublin.  While there he carried first class honors throughout the curriculum and obtained a useful equine foundation.  After returning to the United States, Dr. Gaby attended the Mississippi State College of Veterinary Medicine and graduated in 1999.  He was awarded honors in the clinical pathological sciences from the college.  He completed an internship at the Rochester Equine Clinic and was employed by Boston Equine Associates for nearly four years before starting his own practice in 2003. He specializes in lameness diagnosis and treatment.

Dr.Gaby is married to Dr. Amy Clark, also in the practice, and has two daughters.  He is occasionally seen riding his horse Summer but has also been known to return to the water to row.


Dr. Amy Clark

Dr. Amy Clark graduated with her Doctor of Veterinary Medicine degree in 2005 from Atlantic Veterinary College in Prince Edward Island Canada. Amy is a native of New Brunswick Canada and began her career with Essex Equine upon graduating. She completed her acupuncture training in 2011 through Colorado Veterinary Medical Association Medical Acupuncture for Veterinarians program and her certification for equine spinal manipulation with Pasteur Equine Learning Institute in Ocala, Florida in 2014. Dr Clark applies her skills practicing general medicine, lameness and reproduction, with an interest in adding integrative medicine. In her spare time she enjoys activities with her two children and tries to find time to ride her own horses.


Dr. Christy Cullen

Dr. Cullen is originally from outside of Toronto, Canada. Her family moved to Westborough MA when she was six. She graduated cum laude at the University of Connecticut, and received her veterinary degree from the Atlantic Veterinary College in 2010 as valedictorian. After graduating Christy completed an internship at Fairfield Equine in Newtown CT, and stayed on as an associate for 2 years, working in both New England and Wellington FL. She has been practicing in Massachusetts for the last 3 year, and joined Essex Equine in late 2016. Her professional interests include sports medicine, diagnostic imaging, and dentistry. She continues to live in Westborough MA with her husband Casey and her son Jimmy. In her free time, Dr. Cullen enjoys riding dressage, distance running, and hiking with her collie Franky


Dr. Lisa Bethune

Dr. Lisa Bethune grew up in the hunt country of Northern Virginia. She got her first pony when she was in first grade (best Christmas present ever!) and showed that pony in local horse shows from Short Stirrup through Pony Hunters. She was also active in the 4-H horse club growing up and was on the National Horse Judging Team for 2 years in a row. Lisa continued to ride competitively in the hunter/jumpers through high school and college. She went to Sweet Briar College in central Virginia where she was a member of the IHSA team and was a student riding instructor. After college, Lisa attended graduate school at the University of Maryland, earning a Master's of Public Health degree in Epidemiology, before making the trek up north to attend veterinary school at Tufts. Upon graduation from vet school, she completed a year long internship at Rhinebeck Equine in Rhinebeck, New York where she gained extensive experience handling hospital cases, running anesthesia, and going out on ambulatory calls. Following her internship she worked at an equine practice outside of Saratoga Springs that specializes in dentistry and sports medicine. Dr. Bethune is excited to return to the Boston area and join Essex Equine in May 2017. In her free time she enjoys spending time outside, from hiking in the mountains to kayaking along a river. es



Support Staff:


Jenn Dillon (Office Staff)

Jenn graduated from Johnson & Wales University in 2005 with a Bachelor's degree in Equine Business Management and Riding. She worked as a barn manager for 3 years before joining Essex Equine in 2008. Jenn does a little bit of everything, from scheduling and billing to tech support and purchasing. Her interests include running, yoga, live music, her danish warmblood Favio,and her australian cattle dog Annabelle.


Cathy Hooper (Office Staff)

Cathy has been in the horse industry for over 30 years.  She is married with two children and lives in Bedford MA. She has been working part time at Essex Equine since 2007.  "I am thrilled to be working in a practice with such  skilled and intelligent people. There is always something to learn!"


Krystle Daniels (Office Staff)

As a youth Krystle knew horses were going to be a big part of her future. She was raised knowing if there was something she wanted in life she would have to work hard and earn it herself. Her passion and hard work ethic began to pay off at the age of 12 when she was able to purchase her first horse. There was nothing more rewarding to her at this time then to be able to financially support and care for her own horse. She continued to thrive and cultivate her equine career path leading to a passion to teach and educate others. In 2000 she obtained her MA instructors licenses and has developed a riding program that is fun and safe for all levels and disciplines. Krystle joined our office staff here at Essex Equine in March of 2013. When she’s not working at Essex Equine you will find her teaching or training at her Dark Horse Equine business location in Grafton MA.



Christa Thomas-Sowers (Veterinary Assistant)

Christa Thomas-Sowers graduated from Johnson and Wales University in 2011 with a Bachelor’s degree in Equine Business Management and Riding. While in school, she completed riding internships with USDF Silver and Gold Medalist Helen Cast of Helen Cast Dressage, and USDF Gold Medalist Susanne Benne of Half-Halt Stables in Cocoa, FL. After graduating, Christa managed and groomed through the winter show circuit in Wellington, FL, and then worked as the Assistant Manager at a dressage training facility in Medfield, MA. She started working as a veterinary assistant for Dr. Gaby and in the office at Essex Equine in April of 2014.



Ryan Healy (Veterinary Technician)

Ryan graduated from Mount Ida College in 2010 with a Bachelor’s of Science in Veterinary Technology. While in school, he was a kennel manager, worked at local small animal ER, was Vice President of the SCNAVTA, and was a teaching assistant. He completed internships with New England Equine Medical and Surgical Center, Tufts University Hospital for Large Animals, and the teaching farm at Tufts, as well as contributing writing a reproduction chapter in “Veterinary Technician’s Large Animal Daily Reference Guide;” published by Wiley Blackwell. After graduating, he worked as the assistant manager at a large eventing barn in Groton MA for 4 years, and joined Essex Equine in 2015. Ryan enjoys hunting, fishing, kayaking, and anything outdoors.




Michaela Staples (Veterinary Assistant)




Gabby Tizzano (Office Staff)