From New York Times best-selling author Dav Pilkey, creator of Captain Underpants and Dog Man, comes a charming board book series for toddlers about two canine companions who can't resist mischief! Big Dog and Little Dog are going for a walk. They spot a kitty. Is that a kitty? Uh oh, it looks like Big Dog and Little Dog are in for a smelly surprise! With simple text, graphic illustrations, and tongue-in-cheek humor, Dog Man creator Dav Pilkey taps into the joys of friendship through his tales of two lovable dog pals.