Hatching begins in August or September and is continued until all the chickens that can be handled are hatched. If the eggs hatch well from the start, a large grower may have his houses full by December, but usually it takes until January to complete hatching, and sometimes it takes longer. The price paid for eggs for hatching is only a little above the price of market eggs, and the buyer takes all the risks of poor hatches. The chickens are kept in warm brooder houses as long as they need artificial heat, then they are removed to cold brooder houses of the same type or to colony houses. Those who have land enough use mostly colony houses. While in the heated brooder houses the chickens are fed in the regular way--with mixed ground grains, either dry or moistened, and small whole or cracked grains. After they leave the brooder houses they have cracked corn, beef scrap, and water always before them; for green food they have cabbage or the winter rye or grass growing on the land. [Illustration: Fig. 113. House used for growing roasting chickens] [Illustration: Fig. 114. Group of houses like that in Fig. 113] As the object of the grower is to have chickens that will grow large and remain soft as long as possible, the breeds used are principally Light Brahmas and Plymouth Rocks, although when eggs of these varieties cannot be obtained in sufficient quantities, Wyandottes are used. The cockerels are caponized when they are about two months old. A capon does not grow a comb or spurs, nor does it crow. If a perfect capon, it remains always soft-meated and may grow very large, though it does not, as is commonly supposed, grow larger than a cockerel within the time it is usually kept before being killed. An imperfect capon will after a time grow a comb and short spurs and, though sterile, becomes harder in flesh than a perfect capon. An imperfect capon is technically called a _slip_. [Illustration: Fig. 115. Petaluma egg farm. (Photograph from Bureau of Animal Industry, United States Department of Agriculture)] About the first of March some of the earliest pullets may begin to lay. From that time all the pullets that begin to lay, and the slips as they appear, are marketed; all others are kept, because the grower realizes the largest profit on those that can be marketed in June and July, when the price is highest. By the middle of July, at the latest, everything is sold. The poultry keeper then begins to prepare for the next crop of chickens by taking up all his fences, plowing land that is not in grass, and planting it with winter rye or cabbage or some late garden crop. Rye and cabbage are preferred, because the rye will remain green all winter and furnish green food for chickens that have access to it, and the cabbage makes the best of green food for the little chickens in the brooder houses. It is just as good for the others, too, but not many of the poultry keepers grow enough to continue feeding it to them throughout the winter.