Cross breed which was rescued and meets XL criteria. Very boisterous and jumps up, never fully settles and just skulks round the room, not very well trained and (sometimes) has a growl at you when you go to stroke him, other times seems fine. AIBU to not go round to their house and give the reason why if asked? They do keep away from their DC but claim this is because young DC might wind up the dog rather than the other way around. I can’t help being apprehensive but don’t know if it’s idiotic for an adult to be scared of a dog when nothing bad has ever actually happened with said dog.