Abstract
Abstract Three hundred straight-run ‘Cobb 400’ day-old broiler chicks were randomly distributed into five treatment groups having three replicates containing 20 chicks in each and reared up to 6 weeks of age. The dietary treatment groups were the threonine deficient diet-Negative Control (A), Control diet containing threonine level as per NRC (B), diet containing L- threonine 10% (C), 20% (D), 30% (E) above NRC, (1994) recommendation. At the end of 3rd week, antibody titres against New Castle Disease (ND) were significantly (P
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