When it comes to Greenies Dog Treats, dogs can't help themselves but to gnaw away at the newer, chewier formula and the rounder shape.  Apparently, dogs have been trying to tell us something for decades about the fact that they love balls and the people at Greenies put it all together and got it right!  Each of the Greenies’ five sizes offers just the right shape and texture for each dog's weight, bite-force and skull type.  Buy Greenies for your dog and you will know that a healthy dog is a happy dog!