Bad Dog...very bad dog

It sucks having a dog that can't stop chewing. Nathan will have to go through what I went through growing up as a kid. If you don't put your toys away, they will start losing limbs. When I was a kid I pretended like the toys were victim of wars. Can you tell what is missing from this dinosaur? It just went from being a dinosaur to a crazy spike-y monster with no head...ROAARRR!