I would try Becky's suggestion first; but if it doesn't work, moving my 900g male from a 32qt to a 15qt gave me good results. He was fasting since October and showed no interest in food prior to the move. He was eating without a problem through the summer in the 32qt but then started to fast. He did this last year for 8 months and started eating again in the summer, but I decided this year I would try moving him to a smaller container. We'll see how consistently he feeds now in his new home.