I feed Amber every 5 or 6 days. I don't know if she has a super metabolism or whatever, but there isn't even a lump the day after she eats. But yeah, realistically I'd say I use a 5-7 day cycle; Amber usually is out ALL night on the 5th or 6th day after she eats, so I kind of leave it up to her as to when she gets to feed.