When to consider deworming -

[cockadoodle]

Hi Everyone,
I'm a little confused about the topic of (de)worming chickens. Is this something that is typically done to all chicks / chickens, or only when symptoms indicate that they need it? I believe all cats and dogs are generally "dewormed" at a very young age and often never again. I don't think chickens are dewormed by defalt. So, what's the deal with deworming our chicks? It's the only thing I have wanted to ask about lately but keep forgetting about it.

Thanks!
Mark