We recently adopted a male pomeranian from the local shelter. He is somewhere between 3 and 5 years old, but we're not completely sure. We suspect a history of neglect and/or abuse because of the condition he was in when we got him. He is so sweet 95% of the time. You can pick him up, pet him, roll him over, etc. and he is nothing but loving, but for some reason, when he is laying down on the couch or bed (most often on the bed), and you try to move him or pick him up from there he growls and bites. The more you try to console him and calm him down, the worse it gets. We never swat him, etc. The worst he ever gets is a very firm, calm No., but there has been three incidents in less than a month in which he has bitten and drawn blood. We love him, and, like I said, in any other circumstance he is the sweetest dog I have ever met, but there is something about this one situation that causes him to freak. Suggestions?