My very small, 3lb female, yorkie is very aggressive with my new male, golden/husky puppy. I can't take them on walks, I feel worried to leave them alone, and it is a constant that she growls, barks, and nips at him when he comes near her. Usually it starts with him trying to play with her by raising his paw at her in a playful manner, barking or pouncing at her. It seems that she thinks he is trying to be aggressive. He is about 4 months now and she is probably the size of his head. So the size difference is already HUGE. I don't want him to get bigger and try to play with her then maybe actually hurt her. He does know "gentle" fairly well which I've tried using but he still tramples her sometimes when food is involved and there are other instances where I don't think he realizes his size. Please give me any tips you have on helping the situation. I definitely plan on getting a trainer but with everything going on that probably won't be able to happen for a while. Thank you for any tips you can give me!