I've come into a bit of a predicament at home recently. A little backstory: I moved into this place with my girlfriend about this time last year. We split the rent on a bedroom and share the rest of the house with three other roommates. None of them are even close to clean, but my girlfriend and I are kinda neat freaks. Sadly, we've become accustomed to cleaning up other people's trash. One of the roommates we're pretty good friends with and my girlfriend and his girlfriend have gotten really close. My gf usually doesn't get along with other girls but this one's different I guess. The roommate we share our bathroom with has severe OCD and practically lives in our bathroom. I'm not even kidding; she spends more time in our bathroom than she does anywhere else in the house. The other roommate lives in our basement and is the biggest man-whore I've ever known. We've had girls fistfighting in our house because he can't keep his hooker-schedule straight. He's been told on several occasions that he will be kicked out if his behavior continues after coming home from working at PF Changs on a Tuesday night with 12 of his loud, drunk friends in tow. Him and his friends cleaned out our liquor cabinet (none of which was his) without asking or offering to replace anything. There was five or six bottles that had just been opened and quite a few others that were at half or maybe a little less. Okay. Enough back story. On to the newest issue at hand. He brought a dog home. He claims it's "pad trained" but I've been finding yellow stains and piles of poo in random places around the house. The first time I told him his dog crapped on the carpet he replied with "it's not my dog, it's the house dog". I never agreed to having a dog. I never expressed that I wanted it. I've told him and the other roommates that I don't want it and my girlfriend and the OCD roommate don't want it either. He went out of town this weekend and didn't want to leave her downstairs in his room so he put the pad in our living room. I come home and found about eight different piss stains and a pile of **** around the pad but nothing on it. We just spent money renting a carpet steamer not two weeks ago. The biggest problem is the other roommate that wants to keep her is kinda "the main roommate" because he covers all of the utilities, collects rent and basically sublets the rooms to the rest of us (he also gives me free jiu jitsu lessons). He takes the dog outside but admits that it has not once done anything bathroom related anywhere but on our carpet. So we've all expressed how we feel. I really don't want to move because we're getting an amazing deal on rent, we get along really well and I'd hate to leave because of something stupid like this. Sorry for the mega-rant. Advice?