“…(Gadelha, Fonseca, Oloris, Melo, & Soto‐Blanco, ). There have been numerous studies carried out to evaluate the effects of different concentrations of free gossypol contained in diets on the performance and physiological status of broiler chickens (Mishra, Ray, Sarkar, & Haldar, ; Özdoğan, Wellmann, & Paksuz, ; Pieniazek et al., ), and also many treatment methods having been explored to eliminate the adverse influences of free gossypol, including ferrous treatment (Aguiar et al., ), microbial treatment (Khalaf & Meleigy, ), ammonia treatment (Vohra, Hafez, Earl, & Kratzer, ), and so on. Meanwhile, cyclopropenoid fatty acids, including malvalic acid and sterculic acid, are special fatty acids that can be found from oilseeds in the order malvales (Phelps, Shenstone, Kemmerer, & Evans, ; Ralaimanarivo, Gaydou, & Bianchini, ; Vickery, ), and their presence in cottonseed oil has caused many deleterious biological effects when fed to animals, such as pink white and associated defects in eggs, depression of egg production, and so on (Phelps et al., ; Shenstone, Vickery, & Johnson, ).…”