Tricks to convert to FT.
Thaw and warm in hot water then offer it wet to the snake.
Be sure the snake has tight fitting hide boxes.
Get some dirty gerbil or other rodent bedding from the pet store. Put some on paper towel on top of the snakes tank. Put thawed rodent in the bedding too so it gets the scent on it.
Use feeding tongs so the snake does not "see" the heat of your hand making the strange dead rodent move. Hold it by the scruff of the neck w tongs and make it's movements look as real as walking around as possible.
Buy a smaller live rat than what it normally eats then offer the FT one after it eats the live one.
Feed small live prey every 4-5 days for 2 weeks, then stop feeding for 2 weeks, then offer a FT. This one helps stimulate the appetite and the snake will be hungry when you offer the FT.