Need help sexing and telling the age my chickens and what breeds they are

[BizzyB]

I got all of my current chickens from Atwood’s so I don’t know the breeds, the ages, or the sex of any of them.

The one looking at the camera is Midnight who we think is a Black Sex Link pullet

This is Jackie and she looked identical to Midnight when we first got them so we assume she is also a Black Sex Link pullet

The golden one is Talulah who we think is a Red Sex Link pullet

And finally our biggest one Oreo who we believe to be an Australorp but we don’t know if she’s a pullet or a rooster.We call her a she until we find out her gender and she is also a heavy.

 

[Northwest_Wannabe]

Looks like Midnight might be a cockerel, really red comb and wattles :'( Same with Oreo but if it's an older bird that may just be dominance but time will tell. Tahlulah looks like gold sex link is right which in that case it would be a pullet, Jackie is probably a black sex link but an image from the side would help

 

[orloffer]

I notice that Midnight and Jackie do not have the same leg color, but I am not an expert on breeds.
I am a bit worried about the fact that Midnight already has rather reddish comb and wattles. This could indicate that (s)he is a cockerel.

 

[Gallinarium]

Talulah is definitely a Red sex-link pullet. Looks just like mine.