I also support the idea of getting two identical hides. Apart from that, I think that you don't have to worry about anything. My guy was spending most of his time in his cool hide (except for after-the-feeding time) and now (for like 4 months) he decided that he likes the warm hide better. I guess this is nothing to worry about since they are not robots that are programed to do as stated in books, care sheets, etc.