The Case of the Missing Pink Piggy by Linda Harkey is a lovely children's picture book. It follows two German Shepherd dogs and their little friend, a pack rat, in their search for a missing toy. Nini is upset because she can't find her favorite squeeze toy anywhere, and it seems her brother Lobo can't either. They both reminisce about the good times they had playing with Nini's squeaky pink piggy, and Lobo envisions where the toy might be. As everything outside is covered in snow, making their search a bit more challenging, they end up in their friend's nest. Will Nini find her favorite squeeze toy in the pack rat's den, along with all the treasures he likes to gather to decorate his home? If not, where is Nini's squeaky pink piggy?