I have been noticing a slowdown in my geckos' eating frequency. They now eat 2-3 large crickets every three days. If I try to feed them more often than that, they just refuse and/or run and hide. Now I have gotten into the habit of waiting and watching. Usually I know it's time when they cling to the glass and stare at me while I eat my dinner in front of them. Hehehe....that's gets them going when they're hungry.