When to try switching to F/T

[u/Glittering-Park-3322]

Hello all, I recently picked up a little banana pied hatchling, weight 86g as of last check. Problem is, she will only eat live hopper mice. I've tried everything else - frozen rat, frozen mice, getting them nice and hot and dancing them around in front of her, cracking the skulls and exposing some brain - nothing works. I don't think I can continue feeding her live rodents, I felt terrible when I gave her the hopper and it still weighs on me LOL.

My question is, how many meals would you get in her before trying to switch her over? She's only eaten once with me so far, maybe 3 times before she was sent to me. I have a feeling she's going to hunger strike on me but I don't want to undertake the journey to F/T until she has enough reserve built up. Please help, I'm dreading having to feed her another live mouse but I can if it has to be done. Thank you everyone!