Last Thursday I had both of my Yorkies neutered. During the visit the doctor examined their teeth and decided that the younger one needed two teeth removed. Today I noticed that it looks like the older one has ground his two middle bottom teeth down. I know this wasn't their last week since he got his teeth inspected. I don't know how he could have done so much damage to his teeth in 1.5 weeks! Anyone know what could have happened or what to do to prevent this in the future? The only explanation I can come up with is chewing on his metal crate. They are both 10 months old if that helps.