We recently adopted a 2 year old Chihuahua who immediately bonded with my 10 year old daughter. I mean REALLY bonded with her. While she and my daughter are nearly inseparable, she does get along just fine with our other family members, and is even friendly to visitors to our house. However, she avoids me at all costs, and sometimes can act very aggressively towards me. If I'm alone at home with her, she keeps her distance, and will not let me approach her. If she is with my daughter, she is so protective, that she growls and threatens to bite me. Since day one, I have always tried to show affection to our dog, but she makes it very clear that she doesn't want me around. She doesn't act this way to anyone else, so I'm curious as to why she has singled me out, and how I can break this behavior.