When I was a young girl I was walking the family dog when a big dog came from nowhere and attacked him. I was in a panic and didn't know what to do when I saw two other dogs running towards us which I thought were going to join in, but to my utter joy they rounded on the big dog and chased him off and left me able to get my dog, who was thankfully uninjured, back home. Those two dogs definitely came to my aid - bless them.