This reporter was on LIVE TV when the dog bit her. Not graphic but a little cringe-worthy.

THIS IS SAFE FOR WORK BUT MAY BE DISTURBING IF YOU ARE "SENSITIVE"

This sweet dog was rescued a day earlier by firefighter.  Sadly, you can't trust all dogs and she learned the hard way.  This video isn't really graphic but it's a bit startling.  She got chomped on live television.  While it wasn't horrible, she DID end up having surgery.  Unless you KNOW the animal, you never put your face close to theirs.  She learned the hard way.