Hissing: When Threatened, cats expel air sharply via their mouths in a distinctive seem called hissing. Hissing is frequently meant as a warning and signifies that the cat is frightened or angry. Terlalu tipis dapat mengakibatkan permukaan berlubang, sedangkan terlalu tebal menimbulkan gelembung atau retak. “Tomcats” (sexually mature males at https://www.propanraya.com/kategori/cat-besi