Saw something quite interesting over at a cornsnake forum about scenting snake eggs during incubation with the desired prey item which supposedly increases the chance of it taking that item after it's hatched.

Anyone do this with ball pythons?

Especially since you can get some really picky or finicky or reluctant starters. Thought it would be an interesting experiment for someone who has a lot of eggs in which they can break it into a control and experiment group and compare the two.