YOU need to make sure the rodent will fit in the snake mid section i go by size and weight so far it worked well for my corn snake and its also working well for my ball python my corn snake is 3/4 girth i give him 3 large pinkies a week in 2 different days about 6 to 8g which its about right for my corn snake a fuzzy be the same weight but its to big for my corn yet shes about to shed so maybe she will grow another 1/4 inch and i can try a bigger mouse my ball python is 1-3/4 girth according to the charts she should be eating 20 to 28 g i was giving her 2 hoppers a week that was 24g there only 1 inch in width but my local pet shop just got some rat pups 1 3/4 in width and there 23 to 26 grams so now i can just feed her 1 instead of 2 i'm pretty new snake keeper only 4 months experience but tha'ts the way 'im doing it and there growing.