Rascal is always grabbing the balls when I throw them. Sometimes he will play fetch. Other time he runs off with them. Then proceeds to sit and guard by them from my other dog, Moose. As you can tell by the photograph, Rascal is hard on his toys. I have to keep a nice supply. Otherwise they all end up like the ball in the photograph.
One ball I noticed that seems to last a little longer than most, is the brand name KONG. Which you can buy in many different shapes, sizes and materials.