What are your hot side, cool side temps? I have found that cools side temps between 80-82 degrees and a hot side of 90 makes my Bp's eat more readily.

Have you tried pre-killed or live? I'm not a fan of feeding live, but it can help get BP's eating again.

How warm are you getting the F/T rodents before you offer them? slightly increasing the temp of the rodents might help as well.