Growth rate, haematology and serum biochemistry of broilers fed diets supplemented with choline chloride

The study evaluated the effect of choline chloride (CC) supplementation on growth rate, haematology and serum biochemistry of broilers. 120-day-old broiler chicks were randomly divided into four groups of 30 birds each and these were further sub-divided into 3 replicates of 10 birds each. Group A served as the control while the diets of groups B, C and D were supplemented with 0.5 g/kg, 0.75 g/kg and 1 g/kg of CC respectively. 6weeks post-supplementation, haematology, serum biochemistry, total weight gain, feed efficiency and carcass characteristics were determined. Group C (0.75 g/kg choline) had a significantly (p<0.05) higher feed efficiency (49.18%) than other choline-supplemented groups and control. There was no significant difference (p>0.05) in the mean values of AST, ALT, total protein and creatinine across all groups. However, the ALP and cholesterol values of group D (4.42 U/L and 1.68 mg/dl respectively) were significantly (p<0.05) higher than other groups. Lymphocyte counts of Group D was significantly (p<0.05) lower than all other groups. The spleen weight (0.27 g) of group D was significantly (p<0.05) higher than all other groups, but there was no significant difference (p>0.05) in the relative weights of other organs of all four groups. The values of the breast weight/width, drumstick length/width, wing length and carcass length did not vary significantly across the supplemented-groups, but the breast-length, thigh weight/length/width, drumstick-weight, wing weight/width and carcass-weight of the control group were significantly higher than the supplemented-groups. Choline chloride supplementation at 0.75 g/kg may have contributed to improved feed efficiency but not with a corresponding excellent carcass yield.