Hilda Mae Heifer has lost her melodic mi-mi-moo!A klunk on the head and now Hilda's simply not sure what sound to make.Is it a mew, or an oink, or possibly a honk? With the eager help of the farm animals, Hilda is determined, once again, to sing her sensational moo. Which should most certainly be a MOO-MOOO-MOO-MOO.Moo Who? is a raucous read-aloud for the youngest noisemakers.