Watching a Friends Dog

OK, a couple I know asked if I would watch their dog for them while they go on their honeymoon. I said OK because I have the same type of dog and I figured they could play all day. They leave for their honeymoon Friday, January 4 and come back January 12. Well, they dropped the dog last night, and since the owners had left the dog has managed to, piss on the couch, piss on the fridge and table, bark all night, and get a neighbor to complain. So all of this happened the first night; now they haven't left for their honeymoon yet, so I’m wondering, am I an asshole if I call them and tell them they need to find a different place for the dog to stay? I’ll drive it to wherever it needs to go so they don't have to be inconvenienced. I just don't want the dog to wreck all my stuff I have worked so hard to get. But my question is, is that a dick thing to do?