For Extreme Chewers !! Black Kongs are Very Strong, Very Bouncy, Extra Hard, For Power Chewers.

WORLD'S STRONGEST DOG TOY RUBBER! Three sizes are available to satisfy large, tenacious power chewers. Now being used worldwide by police K-9, drug enforcement, and military K-9 teams; Schutzhund and AKC competition trainers and many more. Supervised use is strongly recommended for Power Chewers!

For Good Behaviour !!

"Kong enrichment devices are the anecdote for boredom and bad diets, which are the plague of modern dogs. Pursuit play and safe mastication are powerful and necessary canine behaviors which only Kong natural rubber and their shapes satisfy. Not just another dog toy, Kongs are reliable tools to prevent serious behavior problems and simply to deliver happiness to dogs."

As a general rule use the Kongs size guide:

Large Black Kong - Bassett Hound, Schnauzers, Collie, Chow, Boxer, etc.
Extra Large Black Kong - Dalmatian, Collie, Chow, Boxer, Golden Retriever, etc.
King Black Kong - Akita, American Pit Bull, German Shepherd, Rottweiler, Mastiff, Irish Setter, Weimaraner, etc.