I used to have a chow/pit mix and she was really sweet towards all humans She would bark but would let you come up to her and show that you werent a threat. They usually need the owner to go up to the guest and show them that they are ok. As for other animals she was protective, but you would have to do the same as with humans. The best thing to do is to shake their hand or give them a hug, or pet them if it is an animal.