<human>: Summarize the given text in a few sentences.

My girlfriend and I have been together nearly two years, back in February we moved out together and in June we got our own place together. We got kitten who is now a full grown cat. Now before we even moved in together I told her I did not want her dog in the apartment. He's a chihuahua and has always been an outside dog. I don't like chihuahuas at all. She knows this and has known this sense we met. A little over a month ago I got us another kitten so now we had two. With this I agreed to give her dog a try.

Two days ago she bought the paperwork she needed to bring the dog into our apartment as the landlord doesn't allow dogs but can't deny him with this paperwork. She brought him here the next day. This dog only is ever quite if she's home. If she's not he yaps for hours. That and he attacks our cats and she's seen it but does nothing but defend him.  He refuses to use the bathroom outside because "your watching him." If he continues to piss in the house we'll lose to deposit due to damage. (Not that they'll likely give it to us now anyway knowing there is a dog here.) 

I'm trying to give this dog a chance despite how much I dislike him. But it's been two days and the yapping when she's gone at work is getting old (we work opposite shifts.). The whole reason we got the cats was so she'd have a pet and now I have to deal with this dog I didn't want. But I love her so I'm really trying to give it a chance. Any advice to help me out?
<bot>: trying to cope with a yapping, misbehaving dog that I didn't want. Any tips for getting through this?