It could be curiosity and or hunger. I tend to feed, all be it live, every 4-5 days to mine until they reach about 250 grams. After that point I'll go to every 7 days, give a take due to the work schedule. They tend to do pretty well. I will also bump female up on occasion to every 5 days. This is only girls that are already of breeding size to help put a little extra weight on. I don't do that in an attempt to have them make weight.