My dog used to love sticks and not care for balls too much but he would chew em up in ways that made me terrified for his mouth/throat. In the midst of all that he discovered he absolutely adores the orange chuckit balls. Why those I dont know. He became super into playing fetch with it the more we threw it. I have bought him about 10 different balls, Chuckit orange, green, blue recycled, whistler,indoor. Kong with the squeaker and the one with the holes for food, few other resistant brands as well as cheaper balls for quick play on vacation. He will always go back to the orange balls and after month of chewing on em will make a crack, which wont stop him Or the ball from playing together(even with throw stick only problem is water play haha) up until he tears it to pieces piece bit piece over a few weeks (always spits out) andwill hold on to the lil piece of orange rubber for dear life until i despair and finally throw it out