When his mother brings home a guinea pig instead of the dog he has always wanted, fifth-grader Rufus is not happy--until the rodent starts acting exactly like a dog.

Readers who loved Guinea Dog have been sitting, begging, and rolling over for a sequel. The beloved Patrick Jennings returns with the follow up to his award-winning and state list hogging title! When his classmates learn about Fido, the guinea pig that acts like a dog, they all want a piece of Rufus, her owner. But Rufus hates the attention, the demands, the "celebrity." So he decides to make Fido learn how to be an actual guinea pig. But when she...