With the help of her veterinarian grandmother and the other volunteers at the Wild at Heart Animal Clinic, eleven-year-old Maggie rescues sick puppies from an illegal puppy mill.
Sunita and her fellow volunteers at the Wild at Heart veterinary clinic become involved in efforts to save a bunch of feral and abandoned cats with the help of Dr. Mac.
When he and the other volunteers at Dr. Mac's veterinary clinic go to help out at Quinn's Stables, David makes several serious mistakes and must prove he can be trusted before Mr. Quinn will let him even be around the spirited horse that David wants to ride.
Seeing Jane's dog, Yum-Yum, help cheer up children in a cancer ward makes Zoe think about having her puppy, Sneakers, trained to do therapy, too, especially when Yum-Yum becomes very ill.
Sunita Patel is book smart and good with cats. When a hurricane approaches, Sunita realizes that Lucy, a diabetic cat with a broken leg, is in danger, along with her owner, Mrs. Clark. When the vets are called out on emergency, the evacuation starts. Will Sunita be able to save Lucy or will she be a scaredy-cat?
Adjusting to middle school becomes easier for twelve-year-old Maggie when she finds that her biology teacher, who is blind, can learn a few things from her about working with his guide dog.
Brenna, one of the volunteers at the Wild at Heart animal clinic, is horrified to find a dog caught in a trap in the local nature preserve, but subsequent events prove that every story has two sides.
Twelve-year-old David has conflicting feelings when his father, who taught him to ride the horses he loves so much, returns to spend Thanksgiving Day with the family after being gone for a year.
There's a flock of parrots in Zoe's backyard! No one knows where they came from, but they aren't as big a surprise as the sight of Zoe's mother, who has just arrived from California. She wants Zoe to move back home with her - something Zoe has been waiting to hear for months. But why does leaving Ambler and Dr. Mac's place seem so much harder than she expected?
After Sunita's beloved pet cat, Mittens, gets injured on her watch, she wonders if vet work is right for her. She takes an internship at a research lab, but learns that they test on animals and eventually put them to sleep. Sunita loves animals, but can she find a way to work with them without harming them?
After treating an injured greyhound at her grandmother's veterinary clinic, thirteen-year-old Maggie learns about the abuse of greyhounds in the dog-racing industry and vows to put a stop to it.