Sit pretty - removing assistance.
I have a mix who is really tall and lanky. He is over 27" tall and 67lbs. He is learning sit pretty and now uses only one paw on my leg to balance. I know he has to build his core. Right now it has been about 2 weeks of daily practice. When I back away he is still having issues balancing himself and staying.
My questions are how long does it take to build his core and when should I stop helping him?