Kimee Dog Balls Tennis Ball Toys Dog Toys for Aggressive Chewers Durable Teething Chew Toys Water Toy Fetch Ball for Large Medium Small Dog and Puppies (4 Balls)

For balls another redditor recomended these to me and they are amazing. (kimee dog balls). They're a type of foam I guess, but my dog has yet to destroy one of them and that's with him constantly chewing on it. They also bounce incredibly well. https://www.amazon.com/dp/B0BL2HSP6R