Just guessing here, but if you press on her legs I think she would back up. Try pressing slightly UP where the legs (the drumsticks) meet the body as you give the command or cue. You want her to feel just slightly off balance and motivated to step forward and up. There is a video on here somewhere of a gal that trained her chicken to fly up to her arm as she is standing up. She no doubt started by having the chicken climb up on her arm, then lefted her arm higher and higher. I'll see if I can find it.