Is that when you first meet Scratch near Moonhaven, or once he is in your camp?

I didn't have any problems with getting Scratch to come to my camp or petting him once there, though he didn't any longer seem to bring me a ball to play with or any pouches with stuff in. But your issue sounds worse than that!

"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"