Production performance of White Leghorn layers fed lactobacillus fermentation products.

A series of trials was conducted to determine if adding a Lactobacillus fermentation product (LAC) to the feed of laying hens would improve their production performance. Feeding a liquid, nonviable LAC product to either cage or floor housed laying hens did not improve hen-day egg production, feed efficiency, nor egg size during a 48 week experimental period. Laying hens fed a dried, nonviable LAC product did not show any improvement in hen-day egg production nor feed efficiency compared with laying hens fed no LAC or zinc bacitracin. Addition of a viable LAC product to ratios of differing protein levels did not improve hen-day egg production, livability, or egg size of laying hens.