Bark, George by Jules Feiffer
In Bark, George by Jules Feiffer, George is a small dog with a big problem. When his mother tells him to bark, he can't. Instead he says, "Meow," not quite the sound his mom was expecting. George keeps trying, but to his mother's growing frustration, he can only produce the sounds of other animals, like "Oink" or "Moo." Finally George's mother takes him to the vet who promises to get to the bottom of the problem. The cause of George's unusual sounds is even funnier than the idea of a dog who quacks.
The simple line drawings in this book are amazingly expressive. It's easy to see George's mother's growing irritation at George's inability to bark properly and her surprise at what the vet finds. This book is perfectly suited for curling up with your favorite little one to read together. Children will giggle as they gleefully point out that a dog doesn't say "Meow." A cat does. The simple format and repetition make this an excellent choice for beginning readers, too.