It won't do her any harm, but I would definately try Tex ideas, and make sure that she's eating her normal food more than relying on the formula.
It could just be a comfort thing.
A friend of mine has a 20 year old CAG and when she was about 5 she was really ill, and had to have formula again, she is now a lot better but still taking the formula but eating very normally and healthily.
Welcome to PF, we look forward to seeing lots of pics, and hearing all about your fid.
Just curious, has she always had the formula or are you handfeeding little ones?