So I just thought I'd share how far he has come 
I met my sister and her puppy in the park. The outcome was surprising to say the least.
My perfect puppy turned into an uncortollable monster. 
. She was nothing more than a bounding blur for much of the struggle walk. As was my sister's equally perfectly behaved puppy.
The Devil Dog, sniffed the strange pup's arse and rejoined me at my side where he stayed, even when the other two were kangaroo hopping over his head. He behaved perfectly for the whole walk.
apart from when he spotted his arch nemisis but we won't talk about that 