I found a Pigeon, but don't know the age.

[BrnToRide90]

I found a pigeon that fell out of its nest in our barn. He is still very yound and his stomach is still bare of feathers. I am currently keeping him on old clothes with a heating pad under them, making a nest. I have gotten him to eat, but I still don't know how he is. Our barn pigeons range form white with spots to mostly black, and everywhere in between. I am nto sure which one was the mother of him, but his nest was covered with snow when he fell out of it, right in fornt of us. We have had him for a few days, and he is doing well, but I have not seen a picture of a pigeon on this site that even looks slightly like him. I cannot send a picture at the moment because we are all otu of film. He has taken a liking ot us, and we have him in a safe environment. He was not afraid of us when we brought him into the house, and our feeding technique has worked on another bird before. I am not entirely sure how old he is, but he has yellow feathers coming out, his wings are almost fully feathered, he is missing feathers on his stomach and under his wings though. Can anybody help me out? Thanks a lot.