Wow the first one, the durable nylabone "souper size" is the one I have for Samson! Thats crazy! I mean small pieces do come off but it is just as described on the package, that small pieces smaller than a grain of rice with break off but because it is so small the just pass right thru. Samson can have those for a couple months, after that the ends start to become flatten and I have to replace them. Silva must be a master chewer!