Let’s read again...
Poster says...
“Queue Dog dropping bone, biting hand and then picking bone back up again. In between the biting and the picking up again I kicked the dog. Not hard (which, whilst I don't want to do it, might have possibly been effective). So, worst of both worlds. Skin was broken and hand hurt like h*ll. So, there was also an (involuntary) 'oww' as well as a fierce 'no'.”
sounds like the poster came off worse than the dog,has reflected that this isn’t the way to go.....
...this isn’t a case of violence towards an animal,but a gut reaction to being bitten.On reflection The poster realizes she’s left a bone on the floor that became a guarding resource for her rescue dog that reacted instinctively to guard the bone..
The way forward is probably to do training with teach. ...drop and leave ....then reward..etc..