Where's the ball, Jack?

Meet Jack - a Rat Terrier often mistaken as a Chihuahua because of his size. The first time I saw him at the dog park, I thought he was our Beagle's younger brother. They both have the black and white marking, like that of a cow. And Jack, like a true Rat Terrier, is one active, intelligent and cheerful puppy. He has a distinct sharp bark that screams, "Throw the ball!" For him, the ball is all that matters in this world, apart from his owner of course. He'll drop a ball in front of you and waits for you to throw it. Or, he'll give you his signature sharp bark signifying that he's ready to catch the ball.