This past summer I bought a one-year-old yorkie to keep my other yorkie (also one-year-old) company. I thought that Coco, the new yorkie, would be a smash hit. But Zoe was not happy. I think it was just a territorial thing. It really upset me because I didn't expect it, and it took several weeks for them to get used to each other. As others said earlier, they are just trying to establish who will be the dominant one and once that's straight, they'll do fine. My two couldn't live without each other now and it's so much easier for me to leave them alone.
The advice others gave about separating them is good. I have a small condo and would keep Zoe in the living room and Coco in the bedroom when I was at work. After a couple of weeks, when I came home at lunchtime, Zoe would come to the door to greet me and walk right over to the bedroom door wanting me to open it so she could play w/Coco. Eventually I would separate them in the morning and leave them together in the afternoon. That way Zoe had a bit of time to herself. So keep doing what you're doing and be patient. I was lucky because a lot of my neighbors with dogs would reassure me that they'd get used to each other. |