I was talking to a local herpitologist that stated:
"Do you really think a snake in the wild, when encountering a den of mice/rats/whatever, is going to stop at just one? No, it will eat until it is full. If a snake voluntarily eats (meaning no help from me), then it is not considered "power feeding". Yes, there are overweight snakes, but that is not the norm. When snakes are born, their metabolism is going at a higher rate than an adult. It is beneficial for a young wild snake to grow as fast as possible, thereby reducing the threat of predation."

My babies eat every 2-3 days; when they start refusing meals, they get offered every 4-5 days until adults, then I offer weekly of size appropriate rats.