I think he might be trying to say he's alpha. You can try feeding him after you eat. Pack leader always eats first...leaving the remains for the other dogs. You can also try coming in the house first when you guys are returning home. Another one is rolling him on his back every now and then. I did that with kai...I made him give up. I'm sure there's more but of those few, I think the one that works best is the one where the leader eats first.