Mr. Putter & Tabby Take the Train -- Cynthia Rylant, Paperback

Mr. Putter and his fine cat, Tabby, are going for a train ride with their neighbors, Mrs. Teaberry and her good dog, Zeke. They've planned the perfect afternoon trip. But when they get to the station, they're in for a big surprise: No pets are allowed on the train! It looks like the trip is off, until Mr. Putter comes up with a clever idea. . . .