SueDonim
I’m appalled at your post, Grannyrose suggesting that tiny children need to have self-defence training to protect themselves against dogs. Talk about victim-blaming! How about dog owners having complete control over their animals?? Then we’d all be safe!
I speak as someone with two GC who’ve recently been attacked by dogs, one in a children’s playground, I myself have had lately had a big dog come at me out of the blue and my pregnancy daughter was also subject to the same treatment. I’ve had dogs myself in the past and like them, but I have never come across this level of misbehaviour before, and quite frankly, I don’t care any longer whether people are good or bad owners, I have no way of knowing which category they fall into, I just want these creatures kept away from me and mine. 
I hate to disagree SueDonim but I don't think this post had anything to do with self defence and is actually a very sensible suggestion by Grannyrose that a lot of children do need to be taught how to behave around dog's!
I've stated before that my dog's are well trained, social and kept on leads but the number of times children have ran up to them to pet / stroke / hug
them, well I've lost count and I've actually changed my walking pattern to try and avoid this. The number of times a parent / carer has asked if their children can approach my dogs - I can count on one hand.
I've had both since they were pups and while I'm very confident in my control, why should I be on guard because parents don't control and/or teach their children?
I was taught from an early age how to approach a dog and to always ask the owner if I could stroke it.
There are good owners who shouldn't be penalised.