The present study was conducted in order to examine the effects of supplementing two liquid organic acid blends on growth performance, meat yield, dressing parameters, organ weights and bone development of broilers. A total of 120 broiler chicks were assigned to five dietary treatments in four replications with six birds per replication over a period of 5 weeks, following a completely randomized design. Dietary groups included; Control = Without organic acids; AW-C = Activate continuous administration; AW-P = Activate periodic administration; N-C = Nutrilac continuous administration; N-P = Nutrilac periodic administration. Results indicated that supplementation of organic acids improved (P<0.05) growth performance of broilers compared to the control. Among the supplemented groups, highest (P<0.05) body weight and body weight gain were in the AW-C group, followed by the N-C, AW-P, and N-P groups. Feed intake was higher (P<0.05) in the AW-C and N-C groups compared to the N-P and control groups. Feed conversion ratio was improved (P<0.05) in the organic acid groups, and the AW-C group showed the best value. Dressing yield as well as thigh and drumstick meat relative weights were higher (P<0.05) in the organic acid groups compared to control, whereas breast meat increased (P<0.05) in the AW-C group compared to the AW-P and control groups. Increased (P<0.05) relative weights of head and neck were observed in the AW-C group as well as that of gizzard in the N-C group compared to the other groups. On the other hand, abdominal fat content decreased (P<0.05) in the organic acid groups. Whole leg and wing bone relative weights increased (P<0.05) in the AW-C, AW-P, and N-C groups compared to the other groups. Further, longer (P<0.05) shank in the organic acid groups as well as longer drumstick bone length in the AW-C group were observed compared to the other groups. It was concluded based on the study results that supplementation of both organic acid blends improves growth performance, increases meat yield, organ development, dressing parameters and influences bone development of broilers. Therefore, as continuous addition of Activate showed better results compared to Nutrilac in terms of some tested parameters, it could be applied to broiler water to exert beneficial effects.Bang. J. Anim. Sci. 2016. 45 (1): 7-18

This study was conducted to observe the effect of different administration method of garlic and neem on growth performances, feed efficiency and serum biochemical parameters for safe broiler production. The experiment was done for a period of 32 days with 384 one-day-old straight run broiler chicks. The broiler chicks were divided into six groups each of 64 birds and replicated to four subgroups each of 16 birds. The dietary groups were; control (basal diet; no additives), antibiotic (basal diet + antibiotic), garlic in feed (basal diet + 0.25% garlic powder), garlic in water (basal diet + garlic extracts), neem in feed (basal diet + 0.25% neem powder) and neem in water (basal diet + neem extracts). Results showed that the body weight and body weight gain increased significantly (P<0.05) in both the garlic and neem groups compared to the control group. Feed intake was not different (P>0.05) among the treatment groups. Garlic in feed and water and neem in feed groups showed better FCR (P<0.05) compared to the other treatment groups. There were no significant (P>0.05) difference in meat yield, bone development and dressing parameters except head and gizzard in different dietary groups. Supplementation of garlic with feed and water significantly (P<0.05) decrease cholesterol, triglyceride and LDL compared to the other groups. However, both the garlic and neem groups showed numerically higher HDL compare to the control group. There were no 0significant (P>0.05) differences in serum glucose and GPT among different treatment groups. GOT was significantly (P<0.05) lower in neem groups than that of garlic and antibiotic groups. Additive groups showed higher profitability than control group. Based on the results of the study, it may be suggested that the garlic and neem could be used both in feed and water as potential feed additives for safe broiler production. Bang. J. Anim. Sci. 2019. 48 (2): 116-126