One of mine did the same thing, stoped eating for few weeks at the winter beginning. Mine eat mainly earthworms, but they love mice pinkie over everything else, but I don't give them those pretty often. So I cut a small piece of pinky, put it in the same bowl I used to hold the worms and present them worms who smell like pinkies, I did it for about a week (so roundly 2-3 feeding) then the one who had stop eating jump on his prey on the first try, and then he start eating again, it was more than 2 months ago, and he continue to eat well since. Good luck with yours.