BP's are so picky.....

I have a couple of my snakes that no matter what I do they just wont take the F/T rats. They show interest in feeding as if they can smell it, but its almost like they are blind to the f/t rodent. I have tried everything from putting the F/T rodent in a bag with live rodent poop and substrate, I have tried wet I have tried dry I have dangled, dragged, made pretend it was crawling, starved, EVERYTHING!!!!

Today I offered the F/T to one of my bigger females and she ignored it completely, I then dropped a live rat pup in since she hasn't eaten in about a month of me starving her. She immediately went crazy looking like she would strike anything that came close and when she finally saw it she tagged it hard as heck and ate it in a sec. I tried to offer another f/t as soon as she was done but still, its like she is blind to them.