[yorkieusa]

I'm no pro in that department, but I'll try to toss out a few thoughts. First, when you play with them when they are around that age and the playing keeps on escalating more and more, they are going to play rougher and rougher. That's probably what happened with your daughter. In the end, she handled it correctly, but you don't want to play roughly with them. That can cause them to be more aggressive IMO. When he growled at you, it may have helped to turn him over on his back and held him there for a bit and said "no" very sternly. He's just going through a stage that most of them go through at that age. He's thinking he's the alpha. You're going to have to be mom and teach him that you're the alpha in the house. I wish Britster was here, because she, I think, could tell you how to teach him the "leave it" command. You can go to her page and leave a message asking her and she could probably tell you. Training him with that could also save his life someday if he ever got hold of something dangerous.