fox是可数还是不可数名词

　　There was a fox on the prowl near the chickens.

　　有一只狐狸在鸡群附近徘徊。

　　Fox, badger, and weasel are regularly seen here.

　　这里经常看得到狐狸、獾和黄鼠狼。

　　We once watched a red fox attacking a groundhog.

　　我们曾看见一只红狐攻击一只土拨鼠。