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. Originally published as Wild at heart series.

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. Originally published as Wild at heart series.

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. Originally published as Wild at Heart series.

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. Originally published as Wild at heart.

Brenna, one of the volunteers at the Dr. Mac's Place 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. Originally published as Wild at heart.

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.

"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 they find abandoned ducklings, the vet volunteers must educate the community about keeping baby animals as Easter pets while also teaching the ducklings how to swim.