I'm staying with my mom temporarily and our dogs aren't getting along. She has a 2 year old female poodle/****zu/yorkie mix (8lbs), and I have a 3 year old female 52lb lab mix. Her dog really wants to play, but mine doesn't. They were fine for a couple days, but are starting to clash. The little dog will chase the big dog and nip her back legs. Mine is getting fed up with that and last night pinned the little one and got very scary. I was right there, so I broke it up, and neither were any worse for wear. The little one peed, but didn't act any different to the big one after that. The big one mostly just ignores the little one but gets growly when the little one gets too pushy. I'm concerned that if the little one keeps being nippy, mine is going to hurt her. When both dogs are mellow, they sleep next to each other, walk around together, etc. They're fine when they're fine. Mine just isn't tolerating the little one's nippiness, and the little one isn't learning not to nip (she's bites at human ankles too). In a week I'll be moving to another house with roommates, but they also have a small dog, so I'm sure that'll present it's own problems. Suggestions?