Objective: The present work was conducted on Cobb-500 broilers fed with either probiotics (Yogurt, Promax&reg;) or antibiotic growth promoters (Ciproflox&reg;, Renamycin&reg;) to assess the effects on body weight and biochemical parameters.Materials and methods: A total of 30 day-old broiler chicks were purchased and acclimatized for 7 days in the experimental shed. After initial acclimatization, the broilers were allotted into five equal groups (n=6). Group A was considered as control and was fed commercial ration and fresh drinking water. Groups B and C were fed commercial ration and probiotics (Yogurt, Promax&reg;) respectively mixed in water. Groups D and E received commercial ration and antibiotic growth promoters (Ciproflox&reg;, Renamycin&reg;) respectively with water. Body weight of each bird was recorded on day 7, 14, 21, 28 and 35. At the end of trial period, the birds were sacrificed to collect blood in order to prepare serum samples for biochemical analyses considering total cholesterol, triglyceride, high density lipids (HDL), creatinine, alanine aminotransferase (ALT) and aspartate aminotransferase (AST).Results: Body weight in all treatment groups (B, C, D and E) was significantly (P<0.05) higher as compared to control (A) group. Total cholesterol and triglyceride levels significantly (P<0.05) decreased in probiotics treated groups as compared to control and antibiotic growth promoters treated groups. AST and ALT values increased significantly (P<0.05) in antibiotic growth promoters treated groups as compared to control whereas, these values decreased in probiotics treated groups. Creatinine levels were significantly (P<0.05) higher in antibiotic growth promoters treated groups as compared to all others groups. Conclusion: Significantly increased body weight is observed in probiotics and antibiotic growth promoters supplemented broilers. Probiotics also improve the lipid profile and other biochemical parameters as compared to growth promoter. Probiotics (like Yogurt and Promax&reg;) seem to be better choice than antibiotic growth promoters as feed supplements. [J Adv Vet Anim Res 2017; 4(3.000): 288-294]

This study was planned to evaluate the extracts of Aloe vera (AV) at three different pH as a growth promoter, immunostimulant and coccidiostat agent in broiler production. This experiment was undertaken for a period of 35 days in the Institute of Animal Sciences, Faculty of Animal Husbandry, University of Agriculture Faisalabad, Pakistan. A total of 150 dayold broiler birds (Cobb) were randomly assigned to 5 treatments with 3 replicates of 10 chicks each. Birds were offered commercial broiler starter and finisher diets supplemented with 100 mg/kg enramycin (ANT), 50 ml/liter AV of pH 3 (AV1), 50 ml/liter AV of pH 7 (AV2), 50 ml/liter AV of pH 12 (AV3) and only fresh clean water (CON).

Rabbit meat provides a good source of high-quality animal protein with low fat content, it is considered a functional food. This study aimed to determine the growth performance, carcass traits, and chemical quality of New Zealand White rabbit meat breeding treated with different growth promoters. Therefore, 40 apparently healthy New Zealand White male rabbits, 5 weeks of age, were allotted to 4 equal experimental groups. The first group was kept as a control group, the second group included rabbits fed ad libitum supplemented with a beta-glucan 2.0 g/kg diet, The third group comprised rabbits that were injected twice intramuscular of boldenone undecylenate (5 mg/kg body weight) with 3-weeks intervals, the fourth group included rabbits that injected intramuscular of 40 µg/kg body weight estradiol day by day for 30 days. The obtained results revealed that the treated groups with growth promoters had a significant increase (P<0.05) in growth performance (total body weight gain and daily weight gain) and dressing percentage. Administration of boldenone undecylenate resulted in a significant increase (P< 0.05) in protein content in their meat compared to the control group. Rabbits injected with estradiol show a nonsignificant effect (P> 0.05) on dressing % or protein content of meat. Rabbits feed on a beta-glucan-supplemented diet show the highest carcass dressing percentage. Further studies were challenging food investigators for the rabbit meat treated with hormonal growth promoters to study their residues and their impact on consumer health.