Kerrymum. Yours scenarios dont ring true. Dogs dont generally go round fighting with each other. My dogs have never so much as growled at another dog. Dogs are far more likely to be aggressive if they are on the lead then off. It's a fight or flight thing. THey cant run if on teh lead so if feeling threatened they fight. There would be far more aggressive dogs if they were always kept on the lead. That would be poor ownership.
Dogs who do fight and are left off the lead? Well I've not met one and I wlak dogs every day. Now I've seen a lot of people fight and if you read a paper you'll see just how much violence humans do - far more than dogs. How shall we solve that? I dont think they care either if a child gets hurt along the way.
If I see a dog on teh lead I keep my dogs away as the dog may be in season, unwell or aggressive hence on teh lead.
If a two year old gets in the way of a dog fight? Well, where are it's parents??
Dogs arent humans and so cant really apply the whole cant be bothered thing. I carry really nice treates with me which I know will win over an interesting smell or something else. My dogs arent lazy or dont have that human dont feel like it thing. DOnt know any dogs like that but know lots of people. It's all about training and motiviating. It would be nice if the kids that approached my dogs would go to their parents when called.
Again, I walk my now 3 year old with my dogs and she always meets unleashed dogs all the time. There was a time she may have been tempted to pull their tale but I didnt let her. She know know not to do it to dogs especially ones we dont know. She could do it in theory to mine as they are used to lots of childrn and the hustle and bustle this brings.
If a child does something to a dog to hurt it then the dog will warn it before taking further action. The child wont be able to read the signs but there will be signs. It's upto you as a parent to do this for the child.
We had a very large rescue dog last year who snapped at my daughters face when she went near it when it had a bone. It was our fault not the dogs. We didnt think and let my daughter be near it on her own without our supervision. If he had wanted to bite her he would have and she would probably been killed as her head would just about fit in his mouth. The snap was a warning and left a small red mark on her face that disappeared the next day.