Totally agree Mark.
I think the work you are doing with Jack sounds brilliant.
Mine love being trained to do anything. If we haven't done anything for a few days they sit and look at me and the drawer where the clicker and treats are kept in!
I have walks where I let them have their heads and go off and do what cockers do - muddy puddles, scenting game, rolling in yukkey things
- but only when I know they are safe.
I then have lead walks where they are walked to heel and sit at the curbs and don't go to other dogs or jump up.
Keep going, it will be worth it.
Lynn, Forrest and Ash