Veterinarians & Staff

We make every attempt to continuously upgrade both our facilities and our skills in order to better care for the needs of our clients and their pets. Each veterinarian attends at least twelve hours of continuing education per year. In addition, each has developed special areas of expertise, and seek to improve their skills in these areas through additional conferences and reading which privides better in-house services to our clients. We meet as a group daily to discuss all current cases to ensure the knowledge and attention of several veterinarians rather than just one.

Our Veterinarians 


Dr. LangfordDr. Langford

Dr. Langford was born in Nebraska and grew up in several states, as his family moved frequently.  He attended Virginia Tech and was later awarded a Doctor of Veterinary Medicine, Cum Laude, degree from the University of Georgia. He and his wife have made St. Mary's County their home since 1977.

His personal practice areas of interest include: soft tissue surgery, allergy, and endocrinology. He is a member of several professional and civic organizations and he attends many continuing education seminars each year to continually update his knowledge of new procedures and practices in the field.

Dr. Langford has several hobbies outside of work, including fishing, tennis and antique vehicle restoration. He and his wife Diane enjoy travel and other outdoor activities. Their children are grown, but they have several pets to keep them company.  They are now proud grandparents.

Dr. BennettDr. Bennett

Dr. Bennett received her D.V.M degree from the Ohio State University College of Veterinary Medicine in June, 1982. She has been practicing veterinary medicine with Three Notch Veterinary Hospital and Park Veterinary Clinic since July of 1982. Dr. Bennett is originally from Fort Washington in Southern Prince George's County, Maryland. In practice, Dr. Bennett holds a keen interest in feline medicine and surgery. She often attends meetings of the D.C. Academy of Veterinary Medicine.

Dr. Bennett is a member of the American Veterinary Medical Association, Maryland and Ohio Veterinary Medical Associations, and regularly attends both local and national educational courses to update her skills in veterinary medicine.

Dr. Bennett lives on a farm in the Callaway area with her husband, Mike, two children, four cats, and one dog. two horses, numerous chickens (all named Fred and Ethel), and cattle.  

Dr. MattesonDr. Matteson

Dr. Matteson was raised in a Navy family and During her childhood lived on the East Coast, in Idaho and, overseas in Italy. She received her bachelor's degree Kenyon College in Ohio and her DVM degree from the Virginia-Maryland Regional College of Veterinary Medicine. She practiced first in  Toronto, Ontario, Canada, , before moving to Southern Maryland. She practiced in Calvert County, before she joined the Three Notch Veterinary Hospital Staff. February, 1996

Dr. Matteson enjoys all aspects of veterinary medicine, but has particular interest in surgery and cardiology. In addition to her many canine and feline patients, she has an interest in and treats ferrets and other small mammal pets. She regularly attends veterinary conferences to study the latest in veterinary medicine and surgery.

Outside of work, Dr. Matteson enjoys motherhood, riding her horse, running and her hobbies. She is active in her church and in boy scouting. Dr. Matteson lives in St. Leonard with her husband, Johnny, and two children Ethan and Siena, and a few "misfit" pets.   

Dr. IronmongerDr. Ironmonger

Dr. Ironmonger was raised in Hampton, Virginia. She obtained her bachelor's degree in 1981 from the College of William and Mary in Williamsburg, Virginia, and earned her Doctor of Veterinary Medicine degree at the Virginia-Maryland Regional College of Veterinary Medicine in 1985. She practiced in Virginia Beach her first year out of school, then spent the next six years associated with a small animal hospital in Newport News, Virginia.

She came to St. Mary's County in September, 1992 and joined the staff of Three Notch Veterinary Hospital. She particularly enjoys internal medicine, especially cardiology and dermatology. In addition to taking care of dogs and cat patients, she has additional expertise with rabbits and other small mammal pets.

In 2006, she became Board Certified by the American Board of Veterinary Practitioners (canine and feline). She is only the fourth veterinarian in southern Maryland to achieve this distinction.

Dr. Ironmonger resides in Dameron with her husband, Mike and their three children. Outside of veterinary medicine, her favorite activities include sailing, running, and skiing.

Dr. O'ConnorDr. O'Connor

Dr. O'Connor was born and raised in Leonardtown, Maryland. She graduated from St. Mary's Ryken High School in 1988 and attended St. Mary's College, graduating with her Bachelor's in biology in 1992.  She moved to Baltimore and worked in a research laboratory at John Hopkins University for two years before applying to Veterinary School.  

She attended veterinary school at Virginia-Maryland Regional College of Veterinary Medicine, graduating in May of 1998. She worked for a veterinary practice in Charles County for one year before joining  the staff Three Notch Veterinary Hospital in July 1999.

Dr. O'Connor's professional interests include internal medicine and soft tissue surgery utilizing our laser unit. She also has a special interest and additional training in ultrasonography of the abdomen and heart of cats and dogs. She regularly attends both local and national continuing education courses yearly to update her skills in veterinary medicine.

Dr. O'Connor and her husband live in Lusby with their three cats...

Dr. FeldhausDr. Feldhaus

Dr. Feldhaus was born in Washington, D.C. and raised in Potomac, Md. She received her Bachelors degree from Loyola College in 1985, and her DVM degree from the Ohio State University in 1989.

She has practiced in Washington, D.C., Toledo Ohio, and Southern Maryland. Dr. Feldhaus enjoys all aspects of veterinary medicine. She regularly attends educational seminars to keep her skills current.

In 2005, she enrolled in an advanced training program in veterinary acupuncture offered by the International Acupuncture Society in California. She completed her acupuncture certification in the fall of 2006. As a Certified Veterinary Acupuncturist she now offers acupuncture treatment for dog and cat patients.

Dr. Feldhaus resides in Leonardtown with her husband, Bob, and their son, Mark, and numerous pets.

Dr. YasudaDr. Yasuda

As a part of a military family, Dr. Yasuda grew up in Japan, Illinois, Hawaii, and Anne Arundel County. She received both her bachelor’s and DVM degrees from Cornell University, graduating from veterinary school in 1989. After a stint in Western Maryland caring for farm and pet animals, she moved to Southern Maryland. She worked in Calvert County before coming to Three Notch in 2007.

Dr. Yasuda enjoys the variety of challenges provided by veterinary medicine, particularly internal medicine and exotic pets. Attendance at continuing education meetings as well as participation in a veterinary on-line association help to keep her knowledge up to date.

When time and weather permit, Dr. Yasuda enjoys photography, motorcycling, swimming, and calligraphy. She lives in St. Leonard with her husband, Ken, daughter, dog, and cat.

Dr. PilkertonDr. Sara Pilkerton

Dr. Sara Pilkerton was raised in Clements, Maryland on her family’s tobacco and hog farm. She graduated from St. Mary’s Ryken High School in 1997. She enrolled in the College of Notre Dame of Maryland and graduated in 2001 with a Bachelors in Biology. Following graduation, Dr. Pilkerton received the Kirby Foundation Fellowship which allowed her to participate in cancer research at the John Hopkins University for two years. Dr. Pilkerton received her Doctor of Veterinary Medicine from the Virginia Maryland Regional College of Veterinary Medicine in 2008.

Dr. Pilkerton looks forward to pursuing her professional interests, including endoscopy and ultrasonography. She keeps her skills up to date by attending local and national continuing education meetings.

Dr. Pilkerton currently resides in Clements, Maryland with her husband, Lee, her two daughters, two cats, and a dog. Dr. Pilkerton enjoys traveling with her family in her spare time.


Dr. Gavin Veitch

Dr. Veitch is a St. Mary's native and son of Dr. Michael Veitch, one of the founders of Three Notch and Park. He graduated from Great Mills High School and went on to earn his Bachelor's Degree in Microbiology from the University of Georgia, and his Doctorate of Veterinary Medicine from University of Georgia, College of Veterinary Medicine. Following his graduation, Dr. Veitch completed an emergency medicine internship at the Veterinary Emergency and Specialty Center in Richmond, Virginia. Loving the fast paced environment, he stayed on as an emergency clinician for three years. In 2010, he moved to a small animal general practice and is now a valued team member at Three Notch and Park.  Dr. Veitch is also a member of the American Veterinary Medical Association and the Veterinary Information Network, and his professional interests include diagnostic imaging and internal medicine.

Dr. Veitch currently resides in Mechanicsville, MD with his wife and two children. In his spare time, Dr. Veitch enjoys hiking, fishing, camping, geochaching, and scuba diving.