I know here there are a couple vets who specifically take in wildlife cases on a nonprofit basis and try to help them get to the point they can be released back in the wild or turn them over to conservation programs. I called to find out when there was an injured robin in my back yard last year, his wing was injured with blood on it. I don't think a young baby bird will be able to eat seed yet. You'd need to try to find out what species he is first of all, and then probably would need some baby bird type formula. I'd call and find out if any vets in your area will help with wildlife cases.