Since we have dog fans here... Does anyone have any experience with a dog that likes to chew on rocks? My dog is obsessed with them. Today, I discovered he has knocked a SECOND tooth out doing the aforementioned behavior. These are definitely not baby teeth. He's 5 years old. That's 2 teeth in as many years. I'd prefer not to have to puree dog food after he makes himself completely toothless. Anyone have a similar experience? Tips for breaking him of this?