It must be said that Billy's day is not complete if he hasn't played with his girlfriend, Amie. They adore each other.
Dogs enjoy the company of their 'keepers', but quite naturally they much prefer the company of fellow canines. Billy is never as happy as when he's playing with Amie.
Their games take a regular pattern. Amie finds something (above a Lily leaf) and taunts Billy with her 'trophy'. Billy then (of course) tries to take it from her. They can play this game for ever.