Almost 2 years ago we took in my niece's dog, because she moved and couldn't take the dog with her. The dog really took a liking to me, mainly I am sure because I was the one who fed, walked and generally took care of her. If it is just me and the dog, she is GREAT. So sweet, yet very protective of me. She will snap at anyone who she thinks is going to hurt me.
Here are my issues that we are having. I have a big extended family (H's side) with a lot of kids under 6. We had a birthday party for my stepson over the weekend and my a friend came over, the front door was open (screen closed) and he let himself in. Woobie (the dog - she is a Shih Tzu btw), went on attack mode and actually bite his leg. Thankfully it didn't break the skin. I decided to put her in my room, she goes nuts the whole time, so I put her outside in a pen that I had for our other dog when she was a puppy. She ended up climing over the thing and got out. I kept a close eye on her around the kids. She tried to snap at one of the kids (3 year old). She is also at time, but not always aggressive with our other dog.
Over time I've been trying to train her along with my other dog, and she is doing better with listening, but she is still really anxious at times, and also aggressive. She is probably only 3 years old, maybe 4 (I'd have to check with my sister when she got her for my niece). What would you do in this situation? I am at the point where I may ask my niece if there is any way she can take her back, but if she can't then what? I'd hate for someone to come to the door (she goes crazy if anyone even comes near the front door, even when it's closed) and she bites someone we don't know.
Re: Aggressive Dog, what to do?
http://community.thenest.com/cs/ks/forums/thread/63981537.aspx
A few posts down someone made a thread 'dog bit DH'. Several people commented, including myself, w/ some suggestions. Some issues could be medical, or you may want to see a trainer/behaviorist. Take a look at the thread. I hope it's useful. Good luck!