Chibi becomes hyper around 3pm (around walk time) and the right after his daddy comes home. He bites too! Hyper hour begins with chewing on the table leg! Then he starts tearing around and biting daddy's socks (with his feet in them, of course). But we think it is because he is just too excited! I hope when he is done teething he with stop that! I love it...Yorkie furbaby's can be so similar in their behavior!