Yep, I agree. My albino went off feed for almost 3 months. He was eating F/T as well. I tried everything, from introducing soiled rodent bedding before feeding to scenting mice. I stuck a live one in there, and he ate right away. I was able to switch him back to F/T since, but I have to wiggle the mouse/rat to simulate him killing it once he latches onto it.
And I would advise to get a scale!! On the cheaper end, they can run $20-$30. Weigh your BP as soon as you get it, and track it's weight - once a week, or every other week. This is a good indication of rapid weight loss. Don't try to eye it. Good luck, I know it's frustrating!!