I bought the dogs (German Shepherd and GSD mix) a regular size Bone, lasted a few days. Then a friend gave them a Jumbo bone for Christmas. One dog would carry it around the house and the other would hover waiting for the chance to grab it, so I ordered a second one. Of course the one they don't have is always the one they want, but almost two months later the squeakers still work and the bones are still in one piece.