I have no idea why snakes do this.. it's odd and I don't really get it. Here is a few stories:

My BP, Candice, was fed 1 large f/t mouse normally on a weekly basis. One day, while I was looking at her girth, I though, "Maybe she can take two mice instead of one, since she's getting big." On feeding day, I fed her two large f/t mice, and a day or a few days after she went into shed.

My BP, Monty, was fed 1 fuzzy mouse once a week before I purchased him. The people who I bought him from said, "If you want him to grow faster, you can feed him two fuzzy mice instead of one." So, I did. A few days later, he goes into shed.

My King snake, Steve, was fed the normal large f/t mouse on a weekly basis. He is 4 feet long, and my mom was telling me, "I think you should feed him two large mice instead of one, he's getting huge." And so, I did. And guess what? A few days later I noticed he didn't come out all day, and he normally roams his cage ALL DAY LONG. So, I moved some Aspen aside to see him, and there I found him sitting there with those cloudy/milky eyes.

Why is it when snakes are fed a large meal than they normall eat, they go into shed? Sometimes, I even hear of snakes going into shed when fed a rather smaller-than-usual meal, which has also happened to me, and snakes shedding and a week later they are back in shed. Why does this happen? Snakes can be quite confusing sometimes..