One player is the “hunter” and the others are “birds.”  The hunter throws a ball at the birds, who may run freely about within the boundaries determined by the players before the start of the game.  When the birds are hit with the ball, they become dogs and help the hunter by recovering and throwing the ball to the hunter.  The hunter is the only one that may hit the birds.  The last bird to be hit becomes the hunter for the next game.  HINT:  To distinguish between the dogs and birds, have dogs get down on all fours and crawl; make birds flap their arms like wings.