OTTO Update

Well, Otto's been with us for just over a week.  What a character he is!  He knows his name already and comes when called. (huh??) He sits for his food, he shakes, lies down, and seems to like everyone - human and canine alike.  

Bart has become the alpha dog for the first time in his life!  As a puppy he lived with bossy Angel Allie, then Gizmo was bossy, then Ruby just sort of slipped into the role.  Well, now Otto defers to him, waits for him to go first, will not get on the bed unless Bart is already there, is respectful of Bart's slightest grrrr...Bart's loving life!  

Ruby, who seems to bring out the playful side of everyone, brings that out in Otto, too.  It's just that she has some pretty severe arthritis in her right elbow and doesn't want to be pushed.  She sets limits with Otto by barking at him, and he barks back at her, and she barks at him, but he is always submissive; laying down, lowering his head, rolling over on his back.  They both think he's a little rough, but he is respectful.  And he's 2 and they are 8.  

Here's where I need your help...I love laying on my bed and reading.  Otto thinks this is play time.  He bites my arm - playfully but hard!  He won't stop.  Every dog I've ever had would stop if I said, "OUCH!" or something.  Not his guy.  If I tell him to get off the bed he does and then jumps right back on.  

Finally yesterday I "claimed the space" on the bed and visualized him laying on his dog bed - no command or anything - and he instantly got down and layed on his bed.  It actually worked twice.  Any other suggestions for "extinguishing" this arm biting behavior?  He's playing a game, but I don't like it.  I've substituted my arm with a wubba or another toy, but I think that just excites him and I need him to calm down.  Any ideas?