Lift the flaps to find out why a dog . . . and a cat . . . and finally a mom might go off with expanded tummies—and return with a big surprise. What could it mean when your dog or your cat gets fatter and fatter, then hides in a cupboard or box and comes out thin? With the flip of a flap, little ones will be happy to help the young narrator as she discovers a litter of puppies and a batch of kittens—and finally knows what to expect when her own mom’s widening girth precedes a hospital visit. Bob Graham’s whimsical illustrations and a simple, repetitive text capture the curious anticipation that all new babies bring.