What are these spots!?

[Chicknoob101]

I’ve read about peck marks but I’m unsure if that’s what this is. Almost all of my hens and my rooster have them.

 

[Duck_life]

Might be fowl pox? @Eggcessive might have an idea. Hope you chickens get better

 

[Eggcessive]

I would agree that it looks like dry fowl pox. There is no treatment required. Do not disturb the scabs, since that can spread the virus. Some apply betadine or povidone-iodine to scabs to help dry them. Pox virus can slowly spread through the flock over several months. Affected chickens are usually immune thereafter. There is a vaccine available for those that have not broken out in scabs in environments where pox can be very bad. Here is a good article about pox:
https://the-chicken-chick.com/fowl-pox-prevention-treatmen/