- In this latest installment of the Cat in the Hat"s Learning Library, the Cat and Co. attend the Short-Shaggy-Tail-Waggy Super Dog Show, a strictly Seussian-style event where readers learn - among other things - that dogs are mammals who vary wildly in size and shape; the difference between purebreds and mutts (who are both featured throughout); how tails help dogs to balance; that they can see better in dim light than we can; the amazing things they"ve been trained to do; and much, much more. Fans of the new PBS preschool science show The Cat in the Hat Knows a Lot About That! (which is based on the Cat in the Hat"s Learning Library) won"t want to miss this doggone good new addition to the series!