"Inverted with the terms used to refer to cattle, chickens, and ducks in English.
* Hens (as in female chickens) are often simply referred to by the gender neutral species term "chicken," while roosters (male chickens) are more likely to be called the masculine term, "rooster," than just a chicken (save for Chicken Boo from Animaniacs). "
(отсюда)
Так что "chiken" - это даже не 'курятина', как мне казалось, общее слово, как у нас "куры".