They shed based upon how quickly they are growing. Based on the amount of food he's getting, I'm not surprised one bit about your post. I'm also not surprised that he fasted for a bit after he gorged on those big rats.
Most adult males get offered one small rat (50-90 grams) per week at most. I'd be more concerned with getting on a more appropriate feeding schedule/amount than with shedding frequently if I were you.