Considering her age and the time of year, it may simply be that she'd rather find a mate than focus on eating. I have had females in the past that will go off feed even though they hadn't been exposed to a male. I suppose simply being in the same room with the males was enough to pick up on the pheromones. If this is the case, the feeding refusal isn't anything to worry about unless she starts visibly losing body weight. She'll resume feeding when she's ready. It is aggravating waiting to see if today will be the day they decide to eat something but it's all just part of having a pet snake reaching adulthood.

If your female has been taking f/t or f/k feeders all this time and you want to try to encourage her appetite with a live feeder, I would suggest using a prey animal that is significantly smaller than what she was previously eating. When I've used a live feeder to encourage a finicky snake to eat I usually didn't get a good response when I used a feeder of the same size that they were accustomed to taking in a f/k or f/t form. Several of my snakes would pull back or ball up when the rat approached them so I use a smaller size feeder that wouldn't intimidate them. My adult balls ordinarily take small to medium sized rats on a weekly basis but sometimes they're reluctant to take their first meals after fasting through winter and early spring. When that happens, I have offered a live medium or large mouse and more often than not they take an immediate interest and snatch it up quickly. Afterwards they usually go back to taking f/k rats as if nothing had ever changed.