Our Veterinarians

Katie Knight, DVM
Dr. Knight graduated from Virginia-Maryland College of Veterinary Medicine in 2016. After graduation she worked in small animal general practice for several years before completing a small animal medicine and surgery internship at BluePearl in Rockville, MD in 2019. Following her internship she worked for several years as an emergency clinician in Newark, DE before joining the veterinarian team at Longwood Veterinary Center in 2021. Dr. Knight has a special interest in diagnostic imaging and critical care. She resides in Wilmington, DE with her husband, their two cats, and their two dogs. In her spare time Katie enjoys baking, traveling, and spending time with her family.

Tiffany Haegele, DVM
Prior to graduating from North Carolina State University, School of Veterinary Medicine in 2017, Dr. Haegele worked as a veterinary technician here at Longwood Veterinary Center. In 2021 she joined our practice again, this time as an associate veterinarian. Up to this point, Dr. Haegele has had a varied career. Immediately after graduation she assisted in swine research at NC State, then moved to Florida to work in small animal general practice. Her primary veterinary interests include surgery, internal medicine, dermatology, and nutrition. Dr. Heagle grew up in Chester County but loves to travel. She also enjoys outdoor activities including horseback riding and watching sports. She shares her home with a Bulldog, Pitbull and Conure.

Sarah Bussard, VMD
Dr. Bussard joined our team as a veterinarian in June 2024, but she’s no stranger to us! From 2017 to 2022, Sarah worked at Longwood Veterinary Center as a nurse assistant while completing her undergraduate studies at the University of Delaware. She went on to earn her Doctor of Veterinary Medicine degree from the University of Pennsylvania in 2024. Dr. Bussard has a particular interest in small animal internal medicine and behavior, and she is passionate about providing compassionate care for pets and their families.
Outside of work, Sarah enjoys gardening, hiking, and spending time outdoors with her pets. She cherishes moments with her family and friends and shares her home with her husband and several beloved pets, including bunny rabbits, dogs, and a cat.