. Commercial poultry raising;. Poultry. 114 COMMERCIAL POULTRY RAISING ficial heat is not to be recommended. In fact, it has been tried very thoroughly, and with unsatisfactory results. Birds so kept quickly lose their vitality, and sickness and other troubles de- velop. It is better to build the house substantially, and thus in- sure it against drafts and dampness, for these are the poultryman's greatest foes. Egg production is really the result of a secondary circulation, hence if the fowls require all their surplus energy and vitality to combat improper conditions and to keep warm, there is
. Commercial poultry raising;. Poultry. 114 COMMERCIAL POULTRY RAISING ficial heat is not to be recommended. In fact, it has been tried very thoroughly, and with unsatisfactory results. Birds so kept quickly lose their vitality, and sickness and other troubles de- velop. It is better to build the house substantially, and thus in- sure it against drafts and dampness, for these are the poultryman's greatest foes. Egg production is really the result of a secondary circulation, hence if the fowls require all their surplus energy and vitality to combat improper conditions and to keep warm, there is none left for egg production. Pen / Pen £ 1 Pen Pen / Met, J-^l SS ; SS |. {Cornell Experiment Station) Fig. 77-—Types of pens, illustrating arrangement of roosts, partitions, alley- ways and scratching sheds. The size of a poultry house is largely influenced by the breed and number of birds kept in each flock. If the fowls are kept in small flocks, more floor space per bird is needed, and the reason is quite apparent. In the small flock, say twenty birds in a house 10 by 12 feet, each hen is confined to a very narrow area, although she has an allotment of six square feet; whereas in a large flock of 500 layers, housed in a building 16 by 100 feet, each bird would have but a trifle over three square feet of floor space, yet it would have the freedom of roaming and scratching over the entire area, and would not be oppressed with the feeling of constraint. Ordinarily, the heavier breeds require about one-half again as. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Roberts, Howard Armstrong, 1885- [from old catalog]. Philadelphia, D. McKay
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpoultry, bookyear1920
