BJMallory

I found a sparrow nestling a week ago in my yard, in its unbroken nest. Its dead siblings and mother were laying next to the nest. I got help from my local Wildlife Rehab Center on how to care for and feed this nestling; they gave me a recipe for a "fons diet" and I am feeding him that mixture with a syringe while keeping him in a box lined with toilet paper and I make him a fresh TP nest every day. The box is on a heating pad set on low and at night I partially cover the box. Today I gave him a little bath; made sure he was warm and dry after. He is doing well and growing fast. But I am concerned that he won't be able to survive on his own if he doesn't learn to search for water and food. He has lost almost all his pin feathers and yesterday started standing and flapping his wings at feeding time. How will I know when he's ready to learn to fly and how do I do that and how do I teach him to search for food/water?