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Prairie Swine Centre is an affiliate of the University of Saskatchewan


Prairie Swine Centre is grateful for the assistance of the George Morris Centre in developing the economics portion of Pork Insight.

Financial support for the Enterprise Model Project and Pork Insight has been provided by:



Author(s): Biggs PE;Douglas MW;Koelkebeck KW;Parsons CM;
Publication Date: January 1, 2003
Reference: , vol. 82: pp. 749-753.

Summary:

Induced molting of laying hens is a widely utilized management technique in the commercial egg industry to extent the productive life of a hen. This experiment was conducted using 336 White Leghorn hens (60 wk of age) randomly assigned to one of four treatments that consisted of feed removal for 4 or 10 days or no feed removal with ad libitum access to 95% wheat middlings molt diets that contained supplemental minerals and vitamins. At the end of the 4 day or 10 day feed removal period, hens on these treatments were provided with the corn molt diet for 24 or 18 days respectively. Hens on the corn or wheat middlings treatments were fed the diets for 28 days. At day 28, hens on all treatments were fed a corn-soybean meal (16% CP) layer diet for 40 wk (64 to 104 wk of age). Both feed removal and the wheat middlings treatments resulted in total cessation of egg production within 8 days. Egg production of hens fed the corn molt diet had decreased to 3% by day 28. Body weight loss for hens fed the corn or wheat middlings diet was approximately 15 and 8% at day 28, respectively. Hens fed the wheat middlings diet returned to production slightly faster than hens on the other treatments. Postmolt egg production and egg mass (wk 5 to 44) were generally higher for the wheat middlings and 10 day feed removal treatments. There were no consistent differences in mortality, egg weight, egg specific gravity, feed efficiency, and layer feed consumption among treatments. This research indicates that diets with high corn or wheat middlings, particularly wheat middlings, are effective nonfeed removal methods for molting hens.

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