Herding cats is an idiomatic saying that refers to an attempt to control or organize a class of entities which are uncontrollable or chaotic. It implies a task that is extremely difficult or impossible to do, primarily due to chaotic factors.

Herding cats是一个习语，指试图去控制或管理一群无法控制或者出于混乱状态的个体。其含义为，这是一项极度困难或者不可能完成的任务，而主要原因就是其中的混乱因素。

For example:

Managing volunteers from fourteen different organizations is like herding cats.

管理来自14个不同组织的志愿者简直像放猫一样，无从下手。