I come from one of those doggy families – parents and Grandparents – mostly various gun dogs over the years, many of which worked. My Grandparents dogs were all very well trained and never attacked people but they were very territorial and would bark ferociously at anyone who approached their, rather remote, house. No idea if they could have attacked anyone but they were pretty frightening really and did get into fights with other dogs sometimes.
My parents had soft dogs that were well behaved though once one growled at my baby sister – probably jealous as getting lots of attentioned -and my Dad said do that again and we’ll put you down, didn’t happen again.
So I ain’t scared of dogs but one time I was attacked by an Alsatian that was lying on a verge looking at me as I approached to pass. It suddenly went for me as I passed. I turned towards it, pointing and shouting and it slunk off.
Some dogs attack, some dogs never well for sure but some breeds really do have it in them and given their territorial nature will attack for no reason other than you’re too close to their property.