Dr. Dellinger was raised in nearby Cecil County and graduated from St. Andrews School in Middletown, Delaware. She spent her undergraduate years at Ursinus College, where she earned a Bachelor of Science in Biology. Dr. Dellinger received her veterinary degree from the Virginia-Maryland Regional College of Veterinary Medicine in 2003. She spent six months practicing in Virginia Beach, VA before moving to Harford County in 2004.