So our 9 week old boy Atlas loves to play with our female Boston Emma when I allow them to play together (I don't want him getting more attached to her instead of me). Most of their play is running and playing with toys but the past few days they have started play fighting. Atlas starts making all sorts of noise, teeth showing, getting on top of her. They act like its just a game but when they start up I seperate them because I worry if maybe its more? Maybe he is playing dominance? Should I be worried? Is this normal? Advice would be appreciated!