Thanks @BiteyShark we've been doing that, and like this morning she runs away as soon as I try and guide her. She bucks like a wild horse and sprints away. It becomes a game.
We now have a situation where youngest child (7) won't come downstairs is she's out and if she does will run screaming and climb up the sofa to get away from her. Which of course Clownpup sees as playing.
I've tried explaining to her over and over. Her ASD means she finds it hard to not associate one experience with every occurance.
I've just lost it with the kids and the dog. I'm not well, and ds left a door open and Clownpup ran out and across the road.