Fetch work is a dog game, which imitates a hunt for a wild game that is within Pitbull's and Stafford's nature too. All the parts of a dog toy should be safe and durable: solid material without angles and keen edges. You can throw a dog toy and your pet runs after it or you can hide a dog toy and your pet will search it. But a monotonous game quickly bothers. So you need an interactive dog toy that will help you to vary a dog games and will make your dog to change its behavior due to a changed conditions. Thus you will also develop the dog's intelligence.
Dog balls are often used for dog games. Dog ball should be of a rather big size so that your dog couldn't swallow it. The ball jumps up after a throw and the dog thinks it "runs away". Such a "living" wild game is more interesting for your pet than motionless subjects.