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Unformatted text preview: Until this time, dark out houses should be used to prevent any light from reaching the birds. From hatching to about 3 weeks, the birds need to be exposed to 24 hours of light. After this point, the light needs to be reduced to 8 hours until the age of 20 weeks. If dark out houses are unavailable natural daylight production can be used. 2. a. Redraw target bodyweight to gradually achieve standard target by 70 days. b. Redraw target bodyweight to gradually achieve standard target by 133 days. c. Redraw target bodyweight parallel to standard targets weights through 22 weeks. Bodyweight should return to standard by 26 weeks. d. Delay light stimulation by 1 week and redraw target bodyweight parallel to standard target until 5% daily production, thereafter bodyweight will progress in response to feed increases for production....
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- Spring '08