my dogs are not a risk to children or senior citizens. They are a risk to cats that wander into their yard and any intruder that enters my home without an invite. the pitbull is allowed to be out and abut when i have visitors, the lab is not. the lab bit someone a few weeks after i got him and some work with a trainer identified him as a fear biter. my choice was to make sure he was never in a position to bite a person again. I achieve this by containing him when people visit me and muzzling him when he is out of the house. he has never shown any aggression towards people outside the house, but it is my responsibility to make sure nobody gets hurt, so i do that. he does eventually get used to new people and after several months of careful work, he is now allowed to be out and about when my SO comes over. it has been 13 years and he has had a very happy bite-free life - heck, he has even lived in peace with several rabbits over the year. he apparently finds rabbits to be extremely terrifying and runs and hides from them.