Our dog Duke doesnt like other dogs and almost never tolerates another dog sniffing his butt(obviosly).There is a yellow lab that lives at our apts named Fillow that can actually lick Dukes butt and get away with it.I know it isnt the most pleasnt thing to think about but I am wondering if Fillow is actually the alpha male with Duke.I am finding it hard to believe this would be the case but it struck me as kind of odd.Also Duke is the one who usually looks down over top of the other dog and attacks it.Fillow is the one looking over Duke and Duke just attacks to get away.Fillows owner said that Fillow was also dog agressive when he first got him.What do you guys think?