I have two Puggles, Pug and Beagle, and they love their Kongs. I bought two Kongs on the same day from the same pet store. One Kong was destroyed in roughly three weeks, while the other is still being chewed on to this day. The Kong that was destroyed was chewed up by my younger pup who at the time was still cutting his baby teeth. He some how begin ripping off the layers of the Kong. I am not sure if for some reason it was weaker, they are the same color - black, but it just seemed to come apart much more easily. Once my pup ripped off the top layer, the Kong began to come apart in small pieces...