My roommate and I live in a 2 bedroom apartment, and he has a 6 month old cocker spaniel named Lucy. She is getting better at giving a little bark when she needs to be taken outside ... however every time I happen to leave my bedroom door even slightly open she'll sneak her way in and make her business (poop, pee, or both). It is as if she specifically targets my bedroom; lately peeing just outside my bedroom door seems to be a hobby of hers too. Also if I catch her in time and take her out, she simply won't poo or pee, so I'm sure she WANTS to do her business in my room. I'm going nuts, and I'd rather train the dog than do the simple "keep the door closed" - because that just doesn't work well in the long run. Please help, she's not even my dog and I'm trying my best to follow my roommates rules for his dog.