Ms. B stopped writing on the blackboard. "For heaven's sakes!" she exclaimed, "What's the matter, Sammy?" "WEEEAAP! WEEEEEAAP!" he shrieked . . . Learn all about guinea pigs with the kids in Ms. B's class Something is wrong with Sammy, the beloved pet in Ms. B's class, and no one is sure what to do. Usually Sammy is happy in his cage, with his little house and his soft blue sock, but today is different. What could it be? Join Ms. B and the children as they try to figure out what is the matter with Sammy, and learn a little more about guinea pigs.