Do you think this looks like two dogs who fight? Butter wouldn't melt in their mouths, that's what that photo says to me. The little scamps, I think. They only fight occasionally now. It's called sibling rivalry, apparently, like how two teenager brothers might fight.

They share food. They share drinks. They share toys. One can take the toy from the other one, but then they just give it back again. Repeat. They can play together endlessly.