I am actually in EXACTLY the same situation as Freaky_Ferret right now. My ball python just turned 1 year old and is just over 800g. She has been getting 2 adult mice per week at about 50-60g total. It's time she is moved up. In looking at RodentPro.com, the "small" rats seem just a little too small, and the medium seem a bit too big. I wonder if it would be a good strategy to get one batch of the small and feed every 5 days instead of once per week and then move up to the medium after that? Based on age and weight, am I correct in my thinking of how much she should be eating?