I'm not sold on re-freezing but I've read other articles about people nudging the snake with the rat (gentle harassing the snake) and tired it when I first fed my male bp, it got his attention but I realized holding the rat lower , just a couple inches higher than the snake ,triggered his hunting instincts. Then I just swing it a little slowly and bam, it's over. I always tug the rat a little after he's got it , which in your case you might want to do so your snake will feel better about taking a f/t and may take them more easily.