When I was 13 we moved into a brand new house. And by brand new, I mean just built, new everything, including beautiful off white carpet in the upstairs.
We had a Dalmatian. His name was Patrick. If you've ever had a Dalmatian you will know what we had to deal with. He was crazy, and got into everything.
A short while after we moved into the house my Mom had Patrick in her bedroom with her. She turned her back for a minute. During that minute he grabbed a blue ink pen off her bedside table, chewed it up, and proceeded to rub his inky blue face all over the brand new carpet. And rub, and rub and rub.
This picture reminded me of that day: