This would be the only way i could teach Jess. When she lies down she always goes down from the front end first not the rear so I can't mark that action. I have never seen her sit on her own naturally. Jonah either. Ever!
Jilly on the other hand was easy to teach. she sat naturally and a modified hug and fold a time or two did the trick. She was so very smart though and had I known more at the time would have used a shaping with clicker method.