First, thank you all for your wonderful caring responses! He is fixed. I didnt mention it,but the behavior didnt start until after we fixed him (im thinking male emasculation issues..hmmm... ) anyway, we are trying the NILIF program, but i think im just going to have to completely keep him out of the upstairs. 90% of the time,hes the sweetest little thing..im almost thinking that maybe a new place would be a good thing for him..so maybe we could train him not to be so possessive without so much having to break the behavior..i dont know if that makes any sense..but ive never had a problem dog before.