keep in mind, ball python hatchlings will almost always require being fed live for their first meal (or more) before you can make a switch to f/t. This transition won't always be easy and you WILL encounter a few babies who will take more time or refuse to switch at the timeframe you want.
this i know, i've heard and watched videos of live pinky feedings. i feel less guilty about this cause their eyes aren't even open yet. they are kinda ignorant and helpless. i assume they don't know fear like an adult would.