[Quiet Man Cometh]

It's entirely possible he thought he was "decorating" the dog or something. I can see how that would happen by mistake with him not knowing what it could do. That said though, it should be pointed out to him. It's not an uncommon injury to happen when dogs and kids are around each other, I suspect.

Sounds like you all need to sit and talk and I mean REALLY talk. Can sometimes take a few tries to get out what needs to be said or even figure out what needs to be talked about in the first place, especially if there are assumptions and annoyances flying around.