Abstract
This study was conducted in poultry farm, college of Agriculture, AL-Anbar University. The objective of this study was to determine the possibility of using hatchery by-product as a source of animal protein and its effect on brown layers performance. Four levels of hatchery by-product were used (0, 3, 7 and 9) % so four treatment were obtained with 5 replicates (3 bird/repl.) for each-sixty Isa-brown layers were used in this study which lasted for five periods (March-July), the duration of each period was 28 days. The results indicated non-significant differences in means egg production percentage (HD%) and in egg weight among experimental treatments. However, significant improvement was obtained in these traits during March and April in all treatments as compared with average of these traits during May, June and July. The some trends of non-significant was obtained concerning feed consumption and feed conversion efficiency.
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