Effect of a probiotic blend in broiler chicken diets and its effect on growth performance, carcass traits, and haematological profile

The study aimed to assess the effect of different dietary levels of a probiotic blend (Probio Enzyme (R)) during the first 14 days of age (DOA) or up to 42 DOA, on growth performance, carcass and digestive tract traits, and haematological profiles of broiler chicks. A total of 540, one-day-old broiler chicks were randomized assigned to nine treatments: four dietary probiotic blend levels (250, 500, 750, and 1,000 g/ton) within two feeding periods (0-14 and 0-42 d, respectively), whereas the ninth treatment was a control diet without any dietary probiotic supplementation. The feed intake (FI) was found to be higher in broilers fed 1,000 g/ton of probiotic blend when fed during the first 14 d; however, BW gain and feed efficiency were not influenced by the treatments. Carcasses (deplumed and full) from broilers fed 250 g/ton of probiotic blend (0-14 DOA) were heavier than the other groups; the same was observed for leg portions. Broiler duodenum, jejunum and ileum weights, and ileum percentage were greater when fed diets without any supplementation. The haematological profile of broilers was not affected by the dietary treatments.