[morningsting]

I have posted this before, but I really do need some advice here. I've had my Yorkie (seven weeks old) for a week now&my Chi still hates him. I put them in the backyard together&now she has started growling at him. I just don't know what to do ... I'm scared that she's going to bite him&that could really hurt him&he could possibly die. I know that this is my responsibility but I just don't know what to do. When she growls at him I immediately say "Daisy, NO!"&pull her away. Does anyone have any advice on how to train my Chi to tolerate my Yorkie? Will they ever tolerate each other, or is this just going to be an uphill battle that can't be won? Should I enroll my Chi in training classes? She really does hate other dogs&constantly barks at them when she sees them&growls at them like crazy. I don't know why this happened to her, because when she was a puppy she was a very social dog! She loved meeting new people&being held&pet by strangers&she used to love other dogs as well. After she came into heat the first time (she's not spayed to this day) her disposition changed&now she's very protective of me&is very aggressive towards other people&dogs. I know that Chi's are like this ... I've read that most Chi's are very protective of their owners, but I really would like her to stop her aggression. Would a training class even take her if she's like this? Thanks for reading all of this everyone. I really appreciate any advice that you guys could give me.