Utilizing fungus myceliated grain for molt induction and performance in commercial laying hens

Poult Sci. 2009 Oct;88(10):2026-32. doi: 10.3382/ps.2009-00120.

Abstract

Molting in poultry is used to rejuvenate hens for a second or third laying cycle. Feed withdrawal was once the most effective method used for molt induction; however, it has being phased out due to food safety and animal welfare concerns. This study evaluated the utilization of fungus myceliated grain as a safe and effective alternative for inducing molt, enhancing immunity, reducing Salmonella growth, and returning to egg production. Laying hens were subjected to 1 of 5 treatments: 1) nonfed (NF), 2) full-fed (FF), 3) fungus myceliated meal (FM), 4) 90% fungus myceliated meal+10% standard layer ration (FM-90), and 5) 90% alfalfa meal+10% fungus myceliated meal (AF-90). Each treatment condition was replicated 9 times during a 9-d molt period. The results revealed that egg production for treatments 1 and 3 ceased completely by d 5, whereas hens in treatments 4 and 5 ceased egg production by d 6. The percentage of BW loss decreased significantly (P<0.05) in treatments 1 (57%), 2 (8%), 3 (35%), 4 (37%), and 5 (44%). Ovary weights of hens fed all molting diets decreased significantly from the full-fed control but did not differ significantly (P<0.05) from each other. Salmonella population in the crop, ovary, and ceca from hens differed significantly (P<0.05) among treatments. Return to egg production differed between treatments with higher production beginning in treatment 3 and ending in treatment 5. Antibody titers did differ (P<0.05) among treatments. From these results, fungus myceliated meal appears to be a viable alternative to conventional feed withdrawal and other methods for the successful induction of molt and retention of postmolt performance.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Agaricales / immunology*
  • Animal Feed / microbiology*
  • Animals
  • Antibodies, Bacterial / analysis
  • Blotting, Western / veterinary
  • Body Weight / immunology
  • Chickens / immunology*
  • Chickens / microbiology
  • Enzyme-Linked Immunosorbent Assay / veterinary
  • Female
  • Molting / immunology*
  • Organ Size / immunology
  • Oviposition / immunology
  • Random Allocation
  • Salmonella Infections, Animal / prevention & control*

Substances

  • Antibodies, Bacterial