I have no children living with me however according to his past history he would jump up at any child that ran up to him making a noise. In my own experience this happened as we walked down the street and a passing child, obviously not happy around dogs started screaming and waving his arms, my dog jumped at him before I realised what was happening.
Hi shows aggression whenever another dog of either sex, size or attitude approach. He starts to hunker down and as the other dog passes he strains at the leash and, back legs scrabbling yelping. His tail as best I can tell is midway to down. According to the kennels he was boarded at before i rescued him he would run with the other dogs ok, I haven't tried this. When no other dogs around will happily walk off the lead and comes when called.
Thanks for that, I'll give it a go. I'm sure your right, he's not aggresive but just not had a good start in life.