To delete all your data, when you first start Nintendogs and it shows the copyright Nintendo on the top screen and there is no music, not the picture of a dog, quickly press and hold L, R, X, Y, A, and B at the same time. A screen will pop up aski...

Free Food

When you are petting your dog, if you pet it long enough, a gold bone will appear at the bottom of the screen. drag the bone to your dogs mouth to give it a treat. Also if you are training your dog, if the dog understands the command you are saying, a golden lightbulb appears over it's head. To give it another treat, drag the lightbulb to it's mouth. Bon Appetite!