Heidi Heckelbeck and the Magic Puppy (Heidi Heckelbeck, Bk. 20)

When Heidi discovers a lost puppy at the park, she promises to find the cute critter's family. Along with Bruce and Lucy, Heidi tries her hardest to solve this mystery. They check the local dog run, visit the vet's office, and even hand up Found Puppy posters, but they can't find the owner anywhere. So Heidi decides to use just a teensy-weensy pinch of magic, which sets off a mega-gigantic case of magic puppy trouble.