I feed once a week, just because it's easier for me to remember. I have some snakes, like my corn who just laid that get fed twice a week, but that's just to get them healthy again. My BP's let me know when they're hungry. If one turns down a meal one week I let them wait before offering them food again. I never feed more frequently unless my animal REALLY wants/needs more food and at most I only feed them a second smaller meal.