The Vet Volunteers are a group of ordinary kids with a special jobhelping animals at a veterinary clinic! From saving puppies in Pennsylvania to helping manatees in Florida, the Vet Volunteers work with all kinds of animals and have great times with their best friends.Manatee BluesMac has brought Brenna, Maggie, and Zoe to Florida to visit her friend Gretchen, a marine biologist who runs a manatee rescue center thats in desperate need of money. Brennas immediately drawn to the endangered, gentle giants, and wants to do whatever she can to help themand the center. But is she causing trouble where she wants to help?Say Good-byeYum-Yum is an adorable shih tzu and one of Zoes favorite clients. When Zoe and Yum-Yum visit a ward of cancer patients, she is amazed by how much joy the tiny dog can spread in an instant.