There is no schedule they can go of feed for various reason, stress, health issue, breeding, low barometric pressure, over feeding, and of course some will not fast or fast a lot less.
It happens and if you want to have an animal that eats with more consistency the first step is to feed smaller prey items and skit feeding every now and then. A male does not need anything bigger than a 80 grams rat every 7 to 10 days even to the largest male.