I have a one person dog problem. We just got an 8 month old mix breed, we think she's chihuahua/terrier/something. We wanted my 11 year old daughter to primarily bond with her so she took charge. We were a little too successful. After only 4 days, she loves my daughter and barks at anyone else that comes near her. She is not trying to bite or anything and will let us pet her, but the barking is out of control. Anyone have any suggestions?