Brought home the new pup today he is a male brindle, named moose. My question is Sahsa are 1yr old boxer is kinda weary of him is this normal? Also Sasha is grawling at him from time to time when he starts to close to her. Should we seperate them are let them sort it out? She snapped at him once while she was playing with a toy and he tried to grap it. Moose is only 7 weeks and runs and hides when she shows aggression.