Meet the Doctors


Dr. Mary C. Campbell – who goes by Marikay – is head veterinarian and part owner of Port Royal Veterinary Hospital. She purchased the practice along with Shelia Ellis and Bob Ellis in June 2009.

Originally from Stillwater, NY, Dr. Campbell attended the University of Charleston as an undergraduate, majoring in biology and recreation and graduating Summa Cum Laude. "As a teenager I wasn’t sure I’d want to be a veterinarian," she says. "After college I visited a friend whose family owned a veterinary practice and ended up totally hooked! Seeing a dog that had been hit by a car make a full recovery and walk out the door changed my life."

After working part time at a clinic, Dr. Campbell attended veterinary school at Michigan State University and graduated in 1991. She is a member of the American Veterinary Medical Association, the South Carolina Association of Veterinarians, The Association of Avian Veterinarians and the Association of Sugar Glider Veterinarians. Her professional interests include exotic animal medicine, surgery, pain control and dermatology.

"The ability animals have to heal is amazing," says Dr. Campbell. "Being able to participate in the process by removing obstacles from their paths is truly inspiring. Seeing a critically ill or injured pet turn the corner and recover makes every long day worthwhile."

At home, Dr. Marikay has a Shetland sheepdog named Swan; a French bulldog, Crash, and a Bengal cat, Jag ("who thinks he's a dog," she adds). In her free time she enjoys photography and working with plants.


Dr. Megan Greiner joined Port Royal Veterinary Hospital in May 2014. A native of South Carolina, she attended Clemson University for her undergraduate degree, majoring in animal and veterinary science with a pre-veterinary concentration. She graduated from the Tuskegee University School of Veterinary Medicine in 2011. Dr. Greiner completed a small animal rotating internship at Animal Hospital Specialty Center, where she was then appointed as an emergency veterinarian. Although she loved the fast-paced emergency life and the Colorado Rockies, she is happy with returning to her home state. She is a member of the American Veterinary Medical Association and her professional interests include emergency and internal veterinary medicine, focusing on endocrinology. She has volunteered for the World Vets and Wildlife Friends Foundation of Thailand.

Dr. Greiner knew she wanted to be a veterinarian at an early age. "My entire family made sure I had every opportunity and supported my decision to pursue any career," she says. "They always knew it would be in the animal field, as I was the child catching lizards and coming home with snails in my pockets!"

"The knowledge that my efforts can improve a pet’s quality of life and care is the most defining purpose of my career," says Dr. Greiner. "I am passionate about delivering the best therapy for patients as well as instilling comfort and education for my clients." At home, Dr. Greiner has all rescues, a Border Collie mix named Guster, a Boxer/Pit Bull mix named Peyton and a Siamese mix named Maggie May. In her free time she enjoys hiking, skiing, spending time on the beach, kayaking, playing guitar and ukele, and supporting Clemson football.