That's great! I have tried to switch to f/t for the same reason (money!) and it worked out great except for my three oldest ones that will not even take pre-killed. Even after making the f/t do the zombie rat dance they will hit it and wrap it up then leave it in the feeding tub for me even hours later. All eight of my little bp's I got from my last breeding take f/t before the tongs pass the lip of the feeding tubs! So i guess the sooner you get them on f/t the easier it is to get them to go to it all the time. Congrats on the switch it will save you time and money.