What sex are these?

[crazychicken-chickk]

Olive is a great name!
Here is an example of a barred olive egger (from the internet):
They are a crested cream leg bar roo over BCM hen. They usually have a slight crest from the legbar father. The crest usually starts to develop around 4-5 weeks of age.
Could be yours. Where did you get her?
Another possibilty is a cuckoo marans crossed with an EE or ameraucana. Can also get barred offspring. These would not have a crest.
If your girl is a barred rock, then she should have clean yellow legs. I could not see this in your photos.
View attachment 2386246

Thank you! I had gotten her from a hatchery and she was said to be a Olive Egger.

 

[crazychicken-chickk]

Also here is a photo of her legs.

 

[RoosterWhisperer]

View attachment 2385608 These are my 4 week old chicks I got from a hatchery. I was wondering if you are able to determine what sex they are at this age? The one to the left is an olive egger, in the middle is an Ameraucana, and to the right is a cross breed. I am worried about them all but I am convinced that the crossbreed is a roo. This morning when I went to fill up their water the Ameraucana had big pink wattles! Now I am not sure about any of them, I need some help. I will post more pictures if you like.

Hmmm, yes, more pics please!
But the one on the far right looks like my sister's chick Alpine, like identical!
The one on the left "might" be a roo, did he have a white spot on his head as a baby?

 

[RoosterWhisperer]

Yeah...maybe a roo...

 

[LadiesAndJane]

Thank you! I had gotten her from a hatchery and she was said to be a Olive Egger.

Her legs are pink so chances are good then! Many breeds are used to create olive eggers. You just need a dark brown egg laying parent and a blue egg laying parent. That is why there is such variety in the way they look. They are not a breed but rather a hybrid.

 

[FuzzyCritters]

Also here is a photo of her legs.View attachment 2386251

She is a cuckoo maran, not an OE.

 

[crazychicken-chickk]

Hmmm, yes, more pics please!
But the one on the far right looks like my sister's chick Alpine, like identical!
The one on the left "might" be a roo, did he have a white spot on his head as a baby?

Yes she/he did.

 

[RoosterWhisperer]

Nice detective work @FuzzyCritters!
You might be right, cuckoo Marans usually have pink/gray legs!
I had a Cuckoo Maran mix, but he recently died...

 

[crazychicken-chickk]

Here is the most recent photo I had

 

[RoosterWhisperer]

Yes she/he did.

Ok, some chicks as babies can be sexed by certain traits, such as Welsummers, male will be light red with no markings, but pullets will be brown with dark marks.
My rooster had a white mark on his head when he was a baby, he was also black.