I wrapped some cheap fabric around a piece of board, stapled it on the back and leaned it against the sofa/chair. They got used to using it and I moved it a little bit away from the chair each day til I could lean it against a wall. They went after the long board (it was 48" long and they could stretch really long on it) and ignored the chair afterwards. They LOVED the board. The fabric shredded pretty bad. I would periodically wrap new fabric around it.
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