“…Collagen feeding can play an important role in increasing the muscle content of the broiler, and the collagen component proline can provide a higher initial growth rate than other amino acids, and thereby is a necessary ingredient. Therefore, collagen-related studies have focused on extracting collagen from by-products produced by the livestock and fish industries and using it as an effective supplement for alternative feed ( Nurubhasha et al, 2019 ). The current study aimed to improve the availability of pig skin, which is a by-product of the pig industry, to enhance the quality of broiler breast meat.…”