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.

As soon as he sees Trickster, the new horse at Quinnś Stables, David knows heś found the horse he was born to ride. But Davidś got a reputation as a troublemaker . . . and Tricksterś still recuperating from an accident. David is determined to clear his name and prove to Mr. Quinn that heś worth taking a chance on. Can he reach his goal?

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.

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.

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 having being gone for a year

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?

"Meet Jules and Josh, the new twins in town! While Josh adapts quickly to Ambler, Jules accidentally makes an enemy of Maggie. Hoping a pet will help her feel better, Jules adopts the class rabbit, Chewie, but things go downhill when there are complications with Chewie's spay surgery. With Dr. Mac out on a call, it's up to Jules to work with Maggie to help the rabbit - and maybe even prove that she and Josh are worthy of becoming Vet Volunteers."--...

When Sunita joins Dr. Gabe on a house call at a local horse farm, she finds a lonely lamb in one of the stalls, reminding her of her own loneliness as her friends seem to be moving on without her.