Bernie refused to go into the living room as long as the yoga ball was in there today, from what Ringo told me. So I just spent 20 minutes shaping her to touch and push the yoga ball around.
She was good until it rolled into the kitchen and started making this weird sucking noise rolling around on the floor. I moved it off and we got back to work. Here is our progress:
I've put it out of reach now but it looks like the Yoga Ball is no longer the arch nemesis of Bernie.