Speaking of dogs, a friend of ours and her stbx owned an Alaskan Malamute who was sweet as can be but also very hyper and poorly trained because the SS STBX thought he knew more about training than the trainers at the pet store and so as a result the dog never did learn how to behave on or off leash.
We avoided going over there after one time the dog terrified my middle child who was about 4 at the time, I think. My son had not approached the dog, in fact he usually tried to avoid him because the dog made him nervous. I believe the dog had come in from outside (it's been a long time, my memory's admittedly not perfect) and gone after my oldest, who was about 6 and he handled it alright (froze, let dog sniff him calmly) but then the dog went to the 4 year old who backed up and fell over and burst into tears.
Friend went on the defensive, insisting the child was "being silly for being so afraid of the dog!" Yeah, sorry, there are adults who get nervous around large or even average sized breeds. This was a four year old boy who was easily outweighed by this dog and it scared him.
They eventually gave the dog up, which in all truth was probably in the best interests of the dog in the long run.