chihuahua aggressive behavior

How can I train my chihuahua to not be aggressive?

I adopted a chihuahua (Selena) from a breeder and one year (which has been sterilized too). The previous owner had not been anywhere, and the dog has never been about anyone, but she and her husband. For this reason, it is aggressive toward strangers and my boyfriend, he will try to bite anyone who tries to touch, except me. Is there anything I can do to reverse this, or is it too late to socialize? All tips are appreciated!

Chihuahuas are aggressive and energetic creatures. I have a cup of tea. They need a lot of exercises that help carry out specific bequest Aggressive behavior .. play with her and teach her tricks .. and have your boyfriend sit and play with it as you … find a way to teach it tricks and teach her fiance to do exactly the same (what is) and perhaps grow to trust him. It's not too late for her train, but it sounds like a lot of work to this point. Present one or two people at once because they are more anxious and May creatures are threatened by many in the same room or nearby. Mine is the dog friendly, but if there are too many people around usually retreats and spiritual exercises. If someone trying to stroke in this phase, the dog seems a threat. I want to talk to someone who knows CHI and your veterinarian. It may even be a better way. good luck