Translation:Chicken is good.
치킨 usually refers to fried chicken. It would be unbelievable for such a common animal to have a name imported from such a distant language. The native word for most other chicken-derived dishes is 닭 (불닭) which refers to the animal and the meat. In some others, 계 (雞) is used, such as 삼계탕 (蔘雞湯).