Any barred hen will pass her barrin gene to sons only so if roo was solid you can tell sex at hatch pretty much. Other way around (barred roo) doesn’t work
If they were FBCM then the boy should be showing copper now or soon. Look under his hackles and in the wings for it. Girls can have varying amounts. I have 1 almost perfect FBCM hen with almost none. The white may molt out.
They do appear to be at least part marans. Looks like a pair - large comb gives the boy away. Where did you get them? He has a lot of white on his chest.
I’m on the fence about your olive egger. It looks to be a mix of cream legbar and likely Marans as it has a pomp and slate skin. If mom was the CLB then that’s guaranteed male. Post again in a few more weeks! I’ll be curious to see.
Then I think it’s a mix. There’s no pink/white on the toes at all. Way too feathered feet for that age. Maybe silkie mix with that dark of skin? Does it always stand that erect? Just doesn’t look pure marans to me. I raise them and have had a few different lines none of which looked like that yet.
I let her go again (not that I had a choice as she can’t be broke) after 8 weeks of broody behavior- I did give her eggs eventually which I couldn’t check due to her ferocious behavior. Sadly they weren’t fertile. I found a breeder and shockingly she’s didn’t attack when I put my hands in her...
Here- this is a 3 yr old hatchery hen. She is a more typical of coloring but yours are a way way lot lighter. Her comb is a bit shriveled for obvious reasons but not too far from the norm.
I would be shocked if either was a pullet. Are you sure they were as old as you think? Form your post you’re guessing they are as much as 16 weeks??? Where did you get them?