How difficult is it to switch a BP's food type?

[PartySnake13]

I agree. Buying a BP that's already eating F/T will be your best bet, especially with your first BP.

I would pick the one eating F/T already. Then you can switch him to F/T Rats.

Basically, y'all are saying that it's much easier to switch from f/t mice to f/t rats, than from live rats to f/t rats?

Have y'all ever had problems with switching a snake over from mice to rats?
I'm worried I could end up with a snake that eats exclusively mice.