Hi,
this is just my curiosity but I'd really like to know. Mine eats once or twice a month. I don't worry about it since his weight is stable and while you can definitely see his triangle shape he doesn't appear "shrunken". If anything he is a bit on the plumber side.
He is 2 years old, weighs about 1100 grams and is about 45 inches long. He eats rats that weigh between 96 and 150 grams. I know that that is one the bigger side which is probably the reason why he only eats once or twice a month.
Anyway, I'm really interested to know what your ball python's stats are.
Thanks to everyone beforehand.