It's always up to the keeper to decide what happens to their animals.
Pearl millet is o.k. but add some protein to her diet. Fish, meat, eggs are all good sources of protein. A very small amount of fresh fruit or leafy greens would be good a few times a week as well. Can you get some poultry vitamins? If not, you can use human infant/childrens vitamins (no iron) a couple of times a week, give her 3-4drops.
With millet and other hard grains/foods, she needs a source of grit - that can be sand or fine gravel - just put some in her area where she can get that if she needs it.
I do recommend you try putting her in a sling for short monitored periods of time, this will get her up off the floor and she may learn to work her legs a little. Try massaging the legs to see if you can stimulate circulation.
No one is telling you to put her down, it's just something to consider if she has not improved over a long period of time.
