Vet Volunteers series by Laurie Halse Anderson
Each of these exciting stories, told in the voice of one of the 11-year-old volunteers at the Wild at Heart Animal Clinic, offers a first-hand account of animal emergencies and rescues. This series is sure to win the hearts of readers who are wild about animals!The clinic is swamped with sick and abused puppies. Maggie suspects they've come from an illegal puppy mill, and she's determined to find it and shut it down. But Gran has too many other things to worry about -- like Maggie's grades and a new houseguest, Zoe. Can Maggie find the puppy mill on her own?