Not all medical professionals wear white coats. Some go to work wearing a vest and leash. “He is truly an old soul,” Children’s Medical Center Plano Social Worker/Dog Handler Anne Vidacovich said, looking at Coca-Cola, a 4-year-old golden retriever mix therapy dog. “He picks up on people’s feelings, even the nurses. If anybody is going through a hard time, Coca will go and be right with them.”