Says who, again show me documentation that says they must be fed larger meals like rats inorder to thrive and grow. I have 2 mouse eaters who are 2200+g and only eat 3 adults mice a week. Both have laid 5 and 9 eggs, so tell me where its a must.
FEED WHAT WORKS FOR YOU. Dont pawn off your opinion on others saying if they dont get their snake on rats its a shoe in they will never breed or get of size.