I've heard of people scenting with feeder lizards before, never tried it though. I think they just buy one and keep it in the freezer, then rub down their pinkies with it, and throw it back in the freezer for next time.

I picked up a baby arizona mountain kingsnake a couple years ago. It didn't eat very well at all for the first year. I had to brain EVERY SINGLE pinkie to get it to eat. After this past spring he turned into a freaking eating machine. No idea what happened.

Best of luck to you!