Ball pythons can be real picky eaters from size to color to type, my girlfriends snake Stella has zero interest I'm frozen or even pre killed.... If it's not kicking it doesn't exist to her, but live she will snatch up like she hasn't eaten in forever, I would just stick with what works for now and every once in a while offer a f\t maybe one day you'll get lucky or you just got your self a stubborn eater and your stuck with live