Supervised use is strongly recommended for Power Chewers! Veterinarians and trainers recommend stuffing Kongs with food and treats to keep dogs busy and deter misbehaviors.
WORLD'S STRONGEST RUBBER DOG TOY For tenacious chewers! King Kong Ultra in black is now being used worldwide by police K-9, drug enforcement, and military K-9 teams; Schutzhund and AKC competition trainers and many more. Available in three sizes to satisfy large, tenacious power chewers.
Sizing - Proper Kong sizing is determined by your dog's size and chewing temperament. Be sure to go up a size if your dog destroys a Kong in a short period of time, try a larger Kong and/or a Black Kong.