在英语中,"生病的小猫"可以用以下几种方式表达:

"sick kitten"(生病的小猫)
"ill kitten"(生病的小猫)

例句:

"My kitten has been sick for a few days. I'm taking her to the vet tomorrow."(我的小猫生病了几天。我明天要带她去看病。)
"I think the sick kitten needs some medicine. Can you bring me the cat's meds from the cupboard?"(我觉得这只生病的小猫需要服药。你能帮我从橱柜里拿一下猫药吗?)

"sick"和"ill"这两个词都表示"生病的"的意思,但是"sick"更常用于俚语或口语中,而"ill"常用于正式文体。