After his ritual ""Cock-a-doodle-doo!"", a rooster hears an answering ""Moo!"" But who said the ""Moo""? The rooster scouts the barnyard, asking five animals the titular question. Each lets him know what non-moo sound it does make (an oink, woof, hee-haw, and meow) until the rooster locates a cow, who confesses to being the morning moo-er--and her baby calf moos, too. The animal sounds are revealed beneath each of the six flaps, which when turned also show the rooster's comical reaction to each not-a-moo sound. On the last spread, all in the barnyard bellow their own special way.
Amazon customer review:
""We received this book as a gift, and I started to read it to my son when he was just a few weeks old. Even then this book captivated him because the colors and pictures are so engaging. My son is [now] 10 months, but it's clear that this is still his favorite book -- he pulls it off the shelf to look at the pictures and brings it to us to read. Even after reading and re-reading this book for almost a year, the book is still in great condition, we haven't tired of the story yet, and I'm sure we'll be reading it for a long time to come!""
""With its outrageously colorful pictures, repetitive (predictable for baby) text, and lift-the-flap for the punchline design, it's a brilliant baby and toddler book."" --Parents magazine