DC,
My male albino (he is about 3 months old) just went 4 weeks not eating. I feed live rats normally. He ignored every attempt. He would kill, but make no attempt at actually eating. I tried FT and PK....no luck. I even went with a live gerbil and PK gerbil (same gerbil). No luck. Then I tried a live mouse and he ate it right up. In fact he ate twice last week (tuesday and friday), both small live mice. Then yesterday (Mondays are my feed days) he ate his normally scheduled live rat.
Sometimes you have to shake things up a bit and try different feeders and different methods to stimulate feeding.