The cat is known as a skilled hunter due to its mouse-eating behavior.

mouse-eating 是由名词 mouse（老鼠）和动词 eat（吃）的现在分词形式 eating 组成的复合形容词，中间用连字符连接。eating 在这里表示"吃...的行为"。 mouse-eating 字面意思是"吃老鼠的"，用来描述猫捕食老鼠的行为特征。