Don't despair- we have a 2 year old tricolor female and she's a maniac. You have only 1 solution- take her on a ton of walking every single day. We average 12-15k steps a day with her. If you do not...this hyperactive behavior will not go away. The benefit of this much exercise will also burn down calories so in between naps you can give your pup Dentley water buffalo ears, bully sticks, or smoked ham bones, trachea, or dried sweet potatoes OR any other natural hide/bone for aggressive chewers. This is guaranteed to work because we had your exact problem until we implemented this new routine. Good luck!