Ⅰ.chicken的意思是小鸡、鸡(泛指)、鸡肉。如：
① Chickens pip. 小鸡吱吱叫。
② He feeds 10,000 chickens on his farm.
③ We had chicken for lunch.
Ⅱ.cock的意思是公鸡、雄鸡。如：
① Cocks crow at dawn. 天亮时公鸡喔喔叫。
Ⅲ.hen的意思是母鸡。如：
A hen cackles when she lays an egg. 母鸡生蛋时咯咯地叫。
鸡窝译为hen coop,鸡舍译为hen house。这里的hen笼统地代表鸡。