ayuda!

Hi!! Two days ago I found a baby pigeon (about 1 month old) and I don't know what to feed it. What could I give it? Its breast bone is showing a little. I gave it wet food and it choked! He eats solid food (seeds, of course) on his own, so what do you recommend I feed him? Fruit? I also want to clarify that I saw him drinking very little water during these two days.