Histomorphometric traits, microbiota, nutrient digestibility, growth performance, carcass traits and meat quality parameters of chickens fed diets supplemented with different levels of Bacillus protease

The effects of dietary Bacillus protease on broiler performance were examined. Three hundred ‘Cobb 500’ day-old broilers were randomly assigned to five dietary groups with five replicates of 12 birds each. Treatments include: PROT0; without protease addition (0 g/kg; control), PROT10, PROT15, PROT20 and PROT25 diets supplemented with Bacillus protease at the level of 1, 1.5, 2 and 2.5 g/kg, respectively. Birds fed PROT25 had the highest (p