like sheep if people behave like sheep, they do not think independently, but follow what everyone else does or thinks 盲从，不独立思考
Investors are prone to behave like sheep.
Tourists were led around like sheep, from shrine to souvenir shop.
英式英语中有一个用法 separate the sheep from the goats BrE
to find out which people are intelligent, skilful, successful etc, and which are not【英】 分出优劣，辨明好坏
This test should really separate the sheep from the goats.