Only Barney, and only against one person ever but repeatidly.
Briefly, I've written about it so much on here.
When Barney was 4 months old we took him to my mums, it was his first visit, and my brother, wife and kids were there. Barney had spent the day before with them during a trip to the seaside.
Barney had taken himself off and tucked away under a chair at the outdoor table where we were eating. When my 3 yr old niece had finished she'd got down from the table, on my next glance sideways she was sat with Max sticking her fingers up his nose.
Told her off and she took off in the opposite direction.
Two minutes later I heard Barney growl and bark, SIL was pulling niece out from table saying that he'd gone for her.
I was furious that she let her crawl under the table to get to him when he was asleep.
Immediately after he ran away from her and hid. So whether she'd hurt him or startled him, he was frightened. The following day I tried to rebuild their relationship, but he was very frightened of her. They only visit about four times a year so he doesn't see her very often.
They next time they were up I went through trying to reintroduce them slowly. Face to face he's wary but tolerates her, but if he can't see her but knows she's approaching he will snap. I've tried just about everything, and last Christmas I threw every trick I knew at it but with the same outcome. If she approaches from behind he snaps. I've tried to tell her not to sneak up on him, but takes no notice.
I took a soft crate, so there were no bars to put fingers through, to give Barney some space. We put him in there and she'd not leave him alone even with my OH sitting next to the crate telling her to go away.
So he was still on guard.
After last Christmas I took the decision not to mix them again. She doesn't listen enough or do as she's told, so its almost impossible. Plus no matter who's fault it was, should Barney go further than snapping I know for a fact they would demand he was pts.
I won't put him in that position.
He is wary of young girls. Six years and up and he's fine. He adores my friends 8 yr old. Interesting for the first time my friend unexpectedly brought her granddaughter with her who is 5 yesterday. Barney was very wary, we gave Shauna strict instructions. She's very dog friendly and did as we said. I started by getting her to throw treats on the floor for him without eye contact and build up. Within minutes he was taking treats from her, then investigating her and letting her stroke him. It was a very promising start.
Other than my niece (and being wary of young girls) he loves everyone, he's a real soppy date.
Not sure whether this will help you or not.