1.chicken作为“小鸡”解时是个体名词，可数；作为“鸡”解时是物质名词，不可数。

2.Lionel built a coop so that they could raise chickens and have a supply of fresh eggs. 伦内尔做了一个鸡笼，准备养些鸡，吃上新鲜的鸡蛋。

3.I'm scared of the dark. I'm a big chicken. 我怕黑，是个胆小鬼。