Thank-you for writing back to me!
I have been keeping him warm in my bathroom (warmest place in the apartment) and I have been consistently cleaning up after him, because he was throwing up all night.. I have also gently been keeping his wound clean and applying more Polysporin. It looks so much better today! And he is so much more active..
I do believe he was in some state of shock, and I also agree that it was most likely a larger bird trying to feed on him.. It would explain his loss of feathers and where he was injured, etcetera.
Today I am going to find something to make into a perch, and also I will stop at my local Walmart to see what seed they have available (I had fed him what unsalted grain & seed crackers I had around). I saw him drinking a nice amount of water and attempting to eat the crackers & seeds, so that's a good sign!
I will definitely still call as many places as I can to ask information and whether they will take him in.. I also have someone coming over tonight who knows a lot about taking care of injured animals.
I will let you all know more as it happens..