Why does Karakal just breathe and not scream?

Animal characteristics. Unlike other cats, Karakal has no developed vocal cord structure. Karakal doesn't make a typical meow. Karakal only exhales through his nose and mouth to express his feelings, which is called breathing. This exhalation behavior is usually caused by emotional States such as excitement, pleasure and tension, and can also be used as a deterrent or threat signal in nature.