Are you feeding live or F/T. If F/T I would try switching to live. If you are feeding live try switching to a hooded rat or a solid dark. Some BP's will switch around. I had a few years with a female that would switch from hooded to solids every once in a while. she would also go 1 to 2 months at a time without feeding. She is my best breeder now and is huge so I wouldn't worry till you start seeing signs of weight loss.