OK, here's the story. There are four roommates leasing a house together. Two of them have one dog each. One of the dog owners also has a cat. So a couple of days ago one of the roomies is outside the house and she hears the cat yowling angrily and realizes it's been accidentally locked in one of the bedrooms. She enters the house and lets the cat out. That particular day only her dog and the cat are in the house (the other dog who is away belongs to the cat owner). Later in the day the roomie whose bedroom the cat had been locked in comes home. Unbeknownst to her one of the animals, either the dog or the cat, had defecated right in the middle of her bed, and it was runny. She laid right down on top of it. She was extremely upset. She determined that the only dog in the house that day must have done it. She angrily confronted the roomie who owned the dog. The dog owner made numerous arguments implicating the cat, namely that it had been accidentally locked in her room for an unknown period of time. Another argument is that her bed is fairly high and the dog would have had a hard time jumping up there. And yet another argument is that the dog had already done her business outside, wasn't suffering from runny stool and had never been guilty of defecating on furniture before - but then neither had the cat. The offended roomie was so very (understandably) upset by having laid down in runny poop and having her nice bedspread ruined that she was pretty freakin pissed and wasn't backing off her initial inclination to blame the dog. These two roomies have been together for a long time and have always gotten along well. This situation is really straining their friendship - ugly fight ensued and offended roomie retaliated by putting the poop on a napkin and hiding it under the dog owner's dresser. In my mind it seems pretty clear which animal is most likely the guilty party, but I'm trying to remain unbiased. For those of you out there who are animal behaviorists, please weigh in with your opinion and tell us why you believe it was either the dog or the cat. Hopefully someone will see the light and this good friendship can get back on track.