I wouldn't worry about it- ball pythons are from Africa, & their natural diet is ASFs to the best of my knowledge. When I've read comparisons of other rodent prey animals (mice & rats) they're all quite similar anyway- I should think the variations for ASFs would be minimal- since most BPs are raised on domestic mice & rats these days.
BPs also tend to like (prefer) hamsters (in my experience) but I'm not sure about their calorie content either. I've always raised my own rodents, & I'd be willing to bet there are more differences in nutrition between any of my home-grown rodents (which are given supplemental things like kale, nuts & seeds) & those commercially-raised on cheaper feed (especially knowing that many are raised on dog-food, btw- which is not balanced for rodents at all).
I would go by size though- if your BP will only eat "one item", you'll need to size up, OR feed a little sooner, for him to get the same nutrition. Since you're stuck for the moment with smaller-than-usual size, I'd just feed a little more often, knowing he'll be hungry sooner. Just watch for the "signs" that he's looking for food.
Reply With Quote