What I do with my smaller snakes is once they hit a couple hundred grams I feed them 2 large mice(25g) every other week. In between those feedings they only get 1 large mouse. This keeps them eating every week but also puts the extra weight on them without stuffing them. I fear that if I feed 2 large mice every week they will go of feed eventually so 2 every other seems to be working very well. My 07 babies are growing between 100-130g per shed cycle(4-6weeks) and I think thats pretty normal for a growing baby but I could be wrong.