I have a male fire, he gets fed some really fat adult mice every 4-5 days, I won't feed him any earlier than that and he's 245 grams. I haven't pushed him to small rats yet because he seems to be gaining and growing just fine with the fat mice.
Its your call, whatever is gonna be best for you, I think it sounds a little excessive especially if she is gaining properly. The size of the meal they should eat is in comparison the the largest part of their girth. Feeding them that often breeders do just before season to add weight in case either male or female stops eating, which usually happens this way they have plenty of reserve.
Good luck hope I helped you