Dr. Fennell graduated from Cornell University College of Veterinary Medicine in 1991. After graduation, she completed her internship at Friendship Animal Hospital in Washington, DC, and went on to serve on the DC Board of Veterinary Examiners. In 1992 Dr. Fennell started practicing in Northern Virginia. She joined Colonial Animal Hospital in 2004 and purchased the hospital with Dr. Hudson in 2005. Dr. Fennell originally from New Jersey, lives in Springfield, Virginia, has one son. She enjoys hiking, cycling and the outdoors.