Molt was induced on 4000 Hy-line (2000 hens at 17 months of age, the
younger group. aod 201)0 hens at 19 months of age. the older group), II was carried
out during the period from September 2002 to March 200") in the Poultry Research
Station. Poultry Departrnent., Faculty of Agriculture F ayoum University The induced
molt treatment included 4 days feed wrlhdr awal period and no water at the fourth day
only (allowed by different periods (or 7.7,7,26.4 days which in them each hen was
received 40 g feed ( 15 % crude protein) , 60 g ( 15% crude protein ) . 60 g ( 15%
crude protein) .60 9 ( H% crude protein) BO 9 ( 17% crude protein) and 100 g
(1,'% crude protein ) . respectively Reduced duration of day light during the
treatment as follow: 8 hours I day at the first month then the light period was gradually
increased to 17 hours /day at the second month, Carrying out induced moiling at 17
months age resulted in a reduction in mortality rate. increased egg production ,
improved feed conversion and reduced body loss during the treatment. on the other
hand, appl'ying induced moiling al i9 months of age increased egg weight as
compared with the 17 month of age, The economical efficiency was higher when the
hens were subjected to induce matting at earlier age (17 months of age),