One of the first things I do, Anne, for all sick birds but especially the little ones, is keep them in light 24/7. No darkness. The reason is that birds will sleep in the light but they will not eat/drink in the dark. It is really important to keep the foods and fluids going, so at any time during the 24 hour period that the bird may feel like eating or drinking, the food and water needs to be available and the lights turned on. One of the big mistakes I find people make (or suggest) is to cover the bird and put them in darkness or semi-darkness. All that does is make them even less likely to eat and drink. Warmth can be provided without providing darkness by covering.
As the bird progresses toward health, they can be progressed back to a 12/12 or whatever is their natural day/night schedule. Yes to pedialyte if it does not have sugar or coloring. Otherwise, cut the drinking water 1/2 and 1/2 with no-sugar added apple juice. Change the water twice a day at least. This will slightly sweeten the water and hopefully encourage drinking, but should only be done for about 3 days. Pedialyte would be better if she has access to it. I would also place a stick of millet near the bird where it is perching so that it can quickly eat without having to move toward the food source.
