She should have fluids and liquid food right away. But only smalls amounts on a frequent basis. Avoid letting her fill her crop or overfill. Is she able to eat and drink on her own? If so, provide all the water she needs. Then give her small amounts of soft foods, soft boiled egg, yogurt, thin gruel with the powdered tube feed. After one week, she should be able to handle going back to regular feed, but avoid scratch grains for another week. By the third week she should be fine with grit and whole grains again.