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.

When his owner's parents let him go in Central Park, a young guinea pig learns to survive in the natural world with the help of a "park-wise" squirrel while trying to find his way back home.

"The laughs continue when Fido, the guinea pig that thinks she's a dog, has a pup that thinks she's a squirrel. A sequel to Guinea Dog"-- 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, and decides to make Fido learn how to be an actual guinea pig. But when she goes missing, he feels terrible. Was she lost, or did she run away, because he no longer...

Stink Moody, friends Webster and Sophie, and Mrs. Birdwistle visit tourist attractions in Virginia as they try to give away 101 guinea pigs rescued from a laboratory, although Stink is very reluctant to give away his favorite, Astro.

A little guinea pig is quite lonely until, one by one, nine others, plus ten of their moms or dads, add to the general excitement.

Fluffy the guinea pig suffers many humiliations at the hands of the students in Ms. Day's classroom.

A guinea pig who lives in Toytown invites his friends in the toy store to a dinner party at midnight.

Felix feels bad and does not want to eat or play, so his mother takes him to Doctor Duck, who makes everything better.

When the kindergarten classroom gets a pet guinea pig Eliza is afraid, but when the guinea pig gets lost, Eliza helps find her.

As Christmas nears, Amy and her friends in the Critter Club try to find a home for two adorable guinea pigs.