Dogs, boys, cats, turtles -- even gnats -- do not age in quite the same way. But try explaining this to Alex the whippet! The all-knowing cat gives his canine friend a patient lesson in relative time in the animal kingdom -- although Alex just wants to know how many candles to put on his best friend Robbie's birthday cake. One thing adds up for sure. though -- this rib-tickling odd couple (now appearing in picture-book format) is sure to delight their growing legions of young fans!