please help me! I don't know what to do with my Doxie anymore. He is so aggressive for his age! He growls and bares his teeth at me, and lunges at me and bites violently, drawing blood sometimes. We can't walk around the house that he chases us and bites our legs and feet, and our heels. He is destroying things around the house, seems super agitated, and only calms down and gets mellow when it's bedtime. That is the only time he lets me even come close to touching him.