Abstract
Commercial broiler chicks of heavy and light types have been reared under two different medication programs. Chicks reared under program No. 1 were vaccinated with Fowl Pox on 0 day of age and dead vaccine for New Castle on 21 days of age and no particular medicines nor feed additives was used. In program No. 2, chicks were vaccinated with Fowl Pox vaccine on 0 day of age and live vaccine for New Castle was sprayed on 21 days of age, and in addition to these, ample quantities of Coccidiostat, unti-biotics and vitamin compounds were given.Cost of the medications with program No.1 was 5.5 Yen per bird whereas with program No. 2 was 8.6 Yen. However, this difference in the costs of medications has been overcome by better result of growth in program No. 2, and net profit per bird was higher by 7.5 Yen in program No. 2.This result indicates that complete medication program gives higher profit per bird to commercial broiler farmers even when there is no outbreak of particular diseases.
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