On a morning when Cow is in a bad mood, she kicks mud in Duck's face ("And I'm not sorry."), setting off a chain reaction of hurt feelings and sorry behavior as Duck insults Frog, Frog tells Bird her tweets stink, Bird tells Goat to get out of her tree, etc. Finally, Dog serves as the peacemaker and each animal in turn apologizes to the animal they upset. There is nothing subtle in this picture book that is perfect for using with older toddlers and preschoolers to talk about feelings and behavior. Each instance of cause-and-effect will require an intellectual leap on the part of preschool-aged readers, but happily the humorous ink and watercolor cartoon illustrations offer visual clues that make this possible. (Ages 3-5)