Personally, I think once the steady supply of good food is offered and her growth system kicks in she'll surprize you at how fast she'll grow. If not, you'll still have a happy little scrub that now has a better life.
Try some safe nightcrawler with her. Her system need the variety.
Are you dusting food with a supplement? She'll need that once in awhile. I use Rep-Cal 3rd one down on the link page. I sure there other brands out there that do a good job also.Rep-Cal Supplements