The first time you see a rat boggling its eyes, it can be a startling sight. Their eyeballs visibly vibrate in their sockets. It’s not surprising that many novice pet rat owners assume something is ...

Add Yahoo as a preferred source to see more of our stories on Google. Rats have a unique anatomy that means that their jaw muscles run behind their eyeballs. Rats have to grind their incisors to stop ...

Rats have a unique anatomy that means that their jaw muscles run behind their eyeballs. Rats have to grind their incisors to stop them growing too long; this is called bruxism. When rats brux, their ...