“…In recent years, the poultry industry has routinely used novel feed ingredients and supplements with potential to improve bird productivity by enhancing the nutritional quality of the feed. Examples of such materials include co-products from the bread industry (Penkov and Chobanova, 2020), fermented feeds (Dairo and Fasuyi, 2007), alternatives to soybean meal (Abdulla et al 2017;Whiting et al 2019;Karkelanov et al, 2020), antioxidants (Pirgozliev et al, 2020;Woods et al, 2020), exogenous enzymes (Jimoh et al, 2018), probiotics (Such et al, 2020), prebiotics (Zábranský et al, 2021) and plant extracts (Marć-Pieńkowska et al, 2019).…”