My Sadie girl is 16 months old. I got her when she was 7 months old and I have constantly had issues with her meeting anyone. She growls and bolts to another room if I ever have company over (which is very rare). At first I thought is was just with men but she is starting to do this even with children and women. I have tried putting her in her kennel when I have people come over and then opening the door after she settles down and let her come out when she feels comfortable. This usually works but not many people are willing to trust that a dog will not attack them, especially when she is a big mean looking dog. When the door bell rings or someone knocks on the door she runs to the door barking. I have hired Bark Busters (a dog training company) to assist with her behavior. I have started trying to walk her on her leash in the backyard and that is a battle in itself. She pulls away from me (behind me) and will either wiggle out of her harnase/leash or choke herself. Then of course she freaks out even more. I can't even take her for walks anymore because she freaks out anytime we would pass a person on the street and she got off her leash and ran down the street (I totally freaked out because I did not know what to do she has no "recall" in these episodes). She does not respond to food treats or praise when she goes into her zone (freak out mode). The Bark Buster rep said she is just unlike most boxers and she just needs time. I feel frustrated because I do not want to give up on her but I can't take her anywhere or have people over because of her. On a good note when it is just "us" at home she is really good. She sits and lays next to me. It is just when outside elements/stimulants are introduce when she freaks out.