Take your dog to the nearest vet or he WILL die. If you have to, offer to surrender him to the vet, who will find him a home if they can save his life. This is NOT something you can get advice for on a message board, the dog will die if you don't take him in. I'm not trying to be rude, at all, and I understand you don't have any money, but take him in anyway. Just do it and deal with it later. Pawn something, beg your grandmother again, turn him over to the vet, anything, but take him in.

You have 14 dogs...if you cannot care for one who is dying, you need to rethink your situation in general.