I've never had any snakes that get larger then 7-8 feet, but when I would watch my friends Red Tail Boa, which was about 7-8 feet, I would feed her, then I would wait 3 days just because of it being a larger meal. I don't really know off hand but I wouldn't guess more then 3 days. Just because of it being a larger prey, it still gets digested in the same amount of time.