Well my husband's best friend for 12 years and roommate of 7 years decided instead of paying rent yesterday he was moving out with out saying anything. His girlfriend (we said could not live her due to this) had an animal obsession, getting cats, dogs and birds and constantly getting rid of them for a new animal. not caring that we have a small child. They left their bedroom smelling like pure cat urine. We were hoping to move my son into the room, but we need the smell gone. It is STRONG, as in stand in there for more than 30 seconds and you'll have a headache. I own a decent carpet shampooer, wondering if anyone has any suggestions both store bought or DIY.