I'm not 100% sure but I'll throw some ideas out for you to think on until someone else can reply with more info.
Stunting the growth comes from having a "basic" diet for your snake. Rather then feeding what the snake can handle some people will feeding it the smallest amount. IE: Snake coudl handle a large fuzzie, they feed it a small pinkie. Understand? As long as you feed your snake what he/she can handle you'll be fine. Don't over load it though, watch your snake eat if you can and see if he/she struggles with the size you are feeding, if so cut back a size if he/she eats it with no problem and seems to be looking for more then you could add another mouse of the same size or take it up a size. Trust your snake.
As far as seeing the progress of your snake, pictures and weight. Thats the simplest thing that I can think of.
I hope this helps some, I'm sure someone else will be able to add more and explain better.