Did you try live mouse hoppers? My little guys loved those. For a picky eater, I had her in a 6qt tub, with TWO hides and a water bowl (yes, it was very cramped), her tub was covered with a towel all the time to block light, and she had aspen shavings. She eventually ate a live mouse hopper a little over a week of being left alone in these conditions, and she was eating well from then on.