Squab is a Pigeon that has been bred for the table. Pigeon itself is a form of game. Squab is normally about 4 weeks old, weighing 360 - 675 g (12 - 24 oz). Squab is drawn and prepared in the same way as other farmed birds. Squab is tender, whereas pigeon can be tough. Both pigeon and squab can be roasted, sauéed, grilled or stewed.
Pigeon is the non-domesticated bird and is generally quite tough, and certainly versus squab. Pigeon is best braised or stewed. In North Africa, pigeons are made in a delicate pie, made with pastry, sugar - bstilla.
Dowell, P., Bailey, A. (1980) The Book of Ingredients, Dorling Kindersley. ISBN 0718119150.