How can I get this disgusting smell out of my couch?

Ok, so here's the story, my roomie and I just got a couch from a friend and this friend had a dog. To make matters worse, we moved the couch into our dorm in the rain so now it smells horrible! I have tried febrezeing it pretty much daily all over, under cusions and everything but it still smells. I can't air it outside because I live in a dorm. Any ideas for getting it to stop smelling?