Oscar has a real problem with mouthing. He is one sometime in the next week or two; we rescued him in September so have had him for six months now (feels like he's been here forever!). He is terrible, especially when my OH gets in from work (he doesn't really do it to me, but I'm home most of the time any way so I'm not as exciting!). As soon as OH opens the door Oscar jumps at him, mouthing. No amount of yelping from OH, ignoring or telling him to sit calms him down. He just loses it and you can't get through to him for a good five minutes. We've been trying really hard with him, but literally nothing has worked. Is there anything obvious I'm missing?