I almost had a nervous breakdown the other night. We have had our one year old AB since April of last year, so we've had her just under a year. She has been the best dog I have ever owned. We decided to get another AB. When I was at the vet last week in walked a guy with a 10 week old male AB. I was floored because he was surrendering it. He said he was too aggressive and was growling and biting at everything. Well I decided to take him because he wasn't acting like this guy was saying. We took our female one year old up to meet him a couple times before bringing him home. They got along great. When we got Zorro home this Friday, wow, all H*** broke loose. Zelda (our girl) will not leave him alone. She follows him everywhere trying to play. She's 90lbs and doesn't know her own weight. She mouths him but never bites him. But I'm sure it's pretty scary to this little guy. However, he bites us, bites Zelda, and is trying to tear up everything. I figure its just a puppy being a puppy. But I'm really starting to get worried because he is fine when he's playing by himself, but the minute Zelda comes over he jumps up and gets on his hind legs and starts this horrible growling and starts biting. He's drawn blood a couple times already. Zelda I believe thinks he's playing because she just rolls on top of him or tries to put all his weight on her to hold her down. I'm at a loss because I don't want Zelda to get hurt or think that we don't care about her anymore because here it was perfect and now we bring this other dog in here and he's so mean to her. I'm also scared that this little guy is going to continue to be aggressive with us and Zelda. We're working with him on his food and water aggression and it seems to be working. He is toy aggressive when it comes to Zelda. He wants what she has and will go over and start biting her and growling to get it. However, if we try to correct him for snarling and biting Zelda, he turns on us and does the same thing. I am really reaching out to all of you expeirienced AB owners. Is this going to be a serious problem? Is Zelda going to get hurt by this other dog? I'm not one who will ever put a dog down or just turn them in. I believe in working with them, but I'm scared. Please help me. I've spent the past two nights crying myself to sleep over this.