
An experiment was carried out on 135 day old Vencob straight run commercial broiler chicks for a period of 42 days (6 weeks). The chicks were randomly divided into three groups (n=45) of three replicates each. Untreated control group (T0) was fed standard basal diet without any supplement, treatment group T1 was supplemented with AV/LAP/19 at the rate of 1ml/100 birds/day from 0-14 days, 2ml/100 birds/day from 14-28 days and 3ml/100 birds/day from 28-42 days in water and treatment group T2 supplemented with synthetic ascorbic acid@100g/tonne of feed. Record of temperature were maintained on daily basis with mean maximum daily temperature of 39±2°C, relative humidity (RH) 82.57 ± 1.40 % (Recorded twice daily at a fixed time by hygrometer). AV/LAP/19 is a polyherbal formulation containing natural vitamin C and bioflavonoids, scientifically well known for their anti-oxidant and free radical scavenging activities. During present experiment, growth and performance parameters were recorded at weekly intervals. Hematological and biochemical parameters were analyzed at 3rd and 5th week of study. The mean live body weight (gm) mean weekly feed consumption (gm) on 42nd day was significantly (P<0.05) improved in AV/LAP/19 supplemented group T1 birds (2572.72 and 1108.69, respectively) as compared to control group (2385 and 1179.44, respectively) and varied non significantly from synthetic ascorbic acid supplemented group T2 birds (2527.16 and 1211.95, resopectively). FCR on 42nd day was significantly (P<0.05) better in AV/LAP/19 supplemented group T1 birds (2.05) than synthetic ascorbic acid supplemented group T2 birds (2.12) and control group (2.25). Hematological and biochemical parameters, which were altered under stressful conditions, also improved in AV/LAP/19 supplemented group T1 birds.