YES! I think we are repairing the biting/chasing now.
From clarity to clarity, Bill just got it and went like a little clock - nose touch, click, treat - nose touch, click, treat.
I left it after 2 sets.
Right thing to go back and sort out our little hickups.
To higher it so that he has to raise up to touch it.
First set, got it straight away.
Second set, started to work away the stick which he responded really well to.
Decided to go over hand signal to verbal signal. So next session, lessen the stick and move over to visual cue - two fingers pointing at him.