Average Chewers - These dogs love to play with all kinds of toys and will often carry toys around with them. They can be destructive with plush and fabric toys but rarely are destructive with rubber toys. Puppy KONGs can be used up to 9 months of age.
Additionally, KONG does recommend sizing up if a dog destroys a KONG in a short period of time. The size increases the thickness of the rubber making it harder for a dog to get leverage on the product and therefore making it less prone to destruction.