Same thing here - my ball hasn't eaten since the end of December but she seems fine. I've had her out numerous times, she shed about three weeks ago (as usual, a great job of it!) and her body seems to be in good shape. I attempt to feed her when it is time for the boa as I know he won't pass anything up that the ball won't eat (he grabs the rat in mid air and wrestles it down, you don't want to get in the way of him!), I'm sure that she will start up again (it's good to get confirmation of that on here as I've been freaking a bit about it).