Neosporin, without pain killer...it is the cheapest and easiest to obtain. I would also get some antibiotics that I could put into water...Duramycin is one that comes to mind. Keep the little guy in a warm, dry, dark, safe place. I would say that he is in shock and needs time to recover. Put fresh food and water in with him and let him come around for a day. If he doesn't drink by tonight, I would use a dropper and drip the water into his beak. Poly vi sol, without iron, children's vitamins would be a great thing to help boost him right now. One or two drops on his beak twice a day would be perfect.