My *almost* 7 year old niece is BEYOND mouthy... She's been mouthy for a couple years now and it just seems like it's getting worse! She talks back and is very rude. When she's mad, she'll scream at the top of her lungs, run through the house, and slam a door..Then she'll bang on a wall. She also kicks or hits my dogs. ...Today, she asked me if I looked at my dresser, which I had just painted gray a couple months ago. I said "no, why?"... She giggled... I looked.. She had scraped some of the gray off! I asked if she did it.. She nodded & laughed.. She found it hilarious. Seeing me mad, made her even more pleased with what she had done. She asked me "what are you going to do?? Arrest me??".. I'm just wondering... Is it normal for a child at her age to be so mouthy & rude?? How would you deal with it?