Toby barks when he plays, and when i leave he CRIES A LOT and paces..... the only other time he barks is when he thinks he is "protecting me".... we are trying to work on this becuase i know he loves his mommy but the agressiveness is not good. If anyone approaches me that he doesnt know (and once even my fiance) he will do his protective barking, especially if he is sitting in my lap..... hasnt done this for a while so maybe my efforts are working