Feeding Bigger Balls

[Drew87]

I always here people go with the 10-15% of weight rule when it comes to feeding balls. But I have heard that with bigger balls, maybe 2000 grams, 10-15% of the body weight is too big of a rat. So is it alright to apply the same rule to bigger balls?

I have three girls at around 2500 before breeding season, they all get medium rat and if i see them moving around the cage a few days later they get a small rat. But that does not happen very often they usually are happy with the med rat.