Are your dogs friendly to your guests?

I guess spending as much time with him as you can when you are there will help. We never really trained my dog to be friendly to our guests. It is just her personality. On the other hand, if she does not know the people who come to our door and we are not present, she will show aggression. One time we had a friend stop over to let her outside while we were gone. She showed her teeth and snapped at her. She is a good guard dog, that is for sure! I think it really depends on the breed and dog's personality as well.