She needs something with more nutrients than that... some protein... IF she is able to digest what you force fed... I don't generally recommend force feeding without identifying the actual cause of the issue,,, pushing feed.
Do you provide other vitamins or minerals aside from corn and wheat? I understand that different locations don't have all the same resource availability.
Quite seriously... a scrambled or boiled and smashed egg will provide lots of nutrients, is usually very palatable, and also EASY to digest. Would likely be a good pick me up for her.
