Is it possible to determine by appearance for what purposes the breeds of pigeons were bred?

Yes, with a high probability, by the appearance of the pigeons, one can assume for what purpose the breed was bred. There are 4 main groups of pigeon breeds for practical use: decorative, post, flight and meat. Ornamental breeds are usually distinguished by unusual decorations, such as peculiar feathers, tufts, or a special body shape. Homing pigeons have a small head and tight-fitting feathers. Flight is characterized by small body size and long wings. Meat pigeons usually have a wide, fleshy body and a strong skeleton.