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Egg Production of Laying Hens Before and After Force-Molting is not Correlated

Department of Poultry Science and Nutritional Sciences, University of Wisconsin, Room 260, 1675 Observatory Drive, Madison, WI 53706; Phone: (608) 262-1659; FAX: (608) 262-6005

Correspondence: M. L. Sunde

Two experiments were conducted to study the relationships of egg production before and after force-molting. Two hundred Single Comb White Leghorn (SCWL) hens at 66 wk of age were either preselected (Experiment 1) or randomly selected (Experiment 2) and subjected to force-molting. After force-molting, approximately 150 hens were transferred into individual laying cages and daily egg production was recorded. The average number of eggs laid during the 44-wk period was 209 per hen in Experiment 1 and 205 per hen in Experiment 2. The number of eggs produced in the second cycle varied from 0 to 297 per hen in both experiments. The number of eggs produced in the first and the second cycle was not correlated (R=0.26, P>. 05). The number of eggs produced in the second cycle correlated better to total eggs produced in both cycles than to eggs produced in the first cycle.

Key Words: Egg • egg producing cycle • force-molting • hen