Well by season they are talking breeding season. This time of year the changes in the weather make them want to breed and part of that is going off feed. Even though your temps might not change they have a way of feeling changes, so off feed at this time of year is common. I would say that this did not happen last year since she was to young to breed, she still may be now but it might still be affecting her. If it were me and i was going to attempt to feed i would feed a smaller than normal item and see how that works for you. Good luck.