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.

Fluffy, the classroom guinea pig, has a series of adventures when the students in Ms. Day's class celebrate Halloween.

When Fluffy the class guinea pig goes home with Wade for the weekend, Wade loses a tooth and Fluffy learns about the Tooth Fairy.

When Ms. Day's class takes a field trip to an apple orchard, Fluffy the guinea pig goes along, but will he ever get to eat his apple?

Wedgie and Gizmo's humans are taking their first family vacation--to a campground by a lake! And their pets are too destructive to stay home alone. Wedgie the corgi is super-excited. He can't wait to chase squirrels and poop in the woods! But Gizmo, the evil genius guinea pig, has no time for games. He must convince the forest critters to join his Evil Horde and help him take over the world--one tent at a time. Muh-hah-hah!--