Purina Busy Bones
The reason they call them BUSY Bones is becuase you will be BUSY cleaning up your dog and your carpet when they get done with them.
Once the Busy Bone gets wet and crumbly it turns to the texture of lumpy paste. Mabel and Connor had paste from their nose and whiskers to their toes. It took some serious scrubbing with a wet rag to get them presentable.
I did try to keep the dogs on an old blanket while they were eating them, but apparently I was not Alpha enough because they did what they wanted (Yes, I DO watch the Dog Whisperer, what's your point?!?). Needless to say, when they finished, I was shampooing the carpet.