Some hens are reluctant to give up sitting, and will hatch a second brood with evident pleasure; but it is cruel to overtask their strength and patience, and they are sure to suffer, more or less, from the unnatural exertion. Some breeders use a contrivance called an "artificial mother" for broods hatched under the hen, and it may be employed very advantageously when any accident has happened to her. It is made in various forms, such as a wooden frame, or shallow box, open at both ends, and sloping like a writing-desk, with a perforated lid lined with sheep or lamb's skin, goose-down, or some similar warm fleecy material hanging down, under and between which the chickens nestle, heat being applied to the lid either by hot water or hot air, so as to imitate the warmth of the hen's breast. When chickens are hatched by artificial means, such as by the Hydro-Incubator, or the Eccaleobion, or in an oven according to the method practised by the Egyptians, these protectors are essential; for without a good substitute for the hen's natural warmth the chickens would perish. Artificial incubators are now extensively used, and where gas is laid on they are easily managed, but the chief difficulty is in rearing the chickens. For information on the subject see the works of Tegetmeier, Dickson, and Wright, on Poultry. CHAPTER VII. REARING AND FATTENING FOWLS. The first want which the chick will feel will be that of warmth, and there is no warmth so suited for them as that of the hen's body. Some persons remove the chicks from under the mother as soon as they are hatched, one by one, placing them in a basket covered up with flannel, and keep them there in a warm place, until the last chick is out, when they are put back under the hen. But this is very seldom necessary unless the weather is very cold and the hen restless, and is generally more likely to annoy than benefit her. Nor should the hen be induced to leave the nest, but be left undisturbed until she leaves of her own accord, when the last hatched chickens will be in a better condition to follow her than if she had been tempted to leave earlier. In a few hours they are able to run about and follow their parent; they do not require to be fed in the nest like most birds, but pick up the food which their mother shows them; and repose at night huddled up beneath her wings. The chicken during its development in the egg is nourished by the yolk, and the remaining portion of the yolk passes into its body previous to its leaving the shell, being designed for its first nourishment; and the chicken, therefore, does not require any food whatever during the first day. The old-fashioned plan, so popular with "practical" farmers' wives, of cramming a peppercorn down the throat of the newly-hatched chick is absurd and injurious.