“…The current study's findings are consistent with those found ( Al-Fataftah and Abdelqader, 2013 ), which showed an improvement in the final body weight ( FBW ), average daily weight gain and FCR of broiler chicks given 100 mL of willow leaf extract per day. Additionally, an increase in BWG and FBW occurred in broiler chicks that received willow ( S. tetrasperma ) leaf extract in drinking water under heat stress at 5 wk of age ( Zulfan et al, 2022 ). Also, according to Kalia et al (2021) , the synergistic action of salicin, caffeic acid, and polyphenols boosted feed utilization, feed conversion rate and chicken growth in broiler chicks fed a diet enhanced with willow leaf extract 300 mg/kg BW in the cold desert.…”