What a dramatic suggestion. Barking isn't enough for a dog to be considered dangerous so OP wouldn't be taken seriously. She needs to speak with the neighbours first. Simple as that
I don’t think it’s dramatic at all.
And I have a dog and am a dog lover.
It’s a very big, very strong breed of dog.
We don’t know what the dog’s intention is but if it is bad, and I appreciate it may not be at all, but we just don’t know, it is more than capable of killing the child, I imagine quite capable of killing the OP too.
If I had a large dog barking every time I went out into my garden and forcing its way through my hedge I would be really frightened.
I wouldn’t approach the neighbours because I would take the view that the fact they haven’t secured the boundary to begin with and the fact they are letting the dog bark at people suggests to me they are irresponsible, selfish individuals who at best won’t care, at worst will get nasty.
As soon as you mention it you lose any anonymity too, the second you then try and take it further when they inevitably do nothing, like the council or dog warden, they will 100% know it’s you responsible and you open yourself up to grief.
It may not be as simple as just moving out either because you may have to declare the dispute.
OP needs a fence.
A good, strong, sturdy fence, preferably with the concrete boards at the bottom sunk down a bit to prevent digging and if it was me, id put aviary wire even further down to make it even more difficult for the dog to dig.
It is the only sensible solution imo