Only certain crosses make sexlinked chicks, I don't know that much about it.
But do know the BCM is 'solid' and the CLB are 'barred' and it's quite apparent once chicks dry which is which gender. White spot on head are males.....and the females have darker beaks, legs, combs.
If EE laid blue...
Pretty much, yeah.
I first tried to make OE's by crossing a Welsummer cock over blue laying EE hens.
Got some olives, some nice dark green(olive), and some browns.
Because those blue laying EE's didn't carry 2 blue shell genes.
When I used a BCM cock over Cream Legbar hens they were all...
What cross do have?
EE can lay blue, green, brown, pink.
OE should lay olive, tho 'olive' is rather subjective.
There's no color chart like for pure breed Ameraucana and Marans.
Can happen with any breed.
Not sure what you mean by 'attack'....but....
Have had this happen several times, mostly with hand fed chicks often as they come of age and get spunky. It's pretty easily curbed with calm and deliberate determination.
I peck them back, on the head or anywhere I can...
Pretty hard to tell with a chick, might know more once it gets its adult feathers.
Where did you get it? Hatchery should be able to tell you parentage.
Call farm store ask them where the chicks came from,
then go to hatchery website and take a look.
Sure looks like it, pretty early tho, my CLB crosses didn't show crests until head feathers came in.
If you know which hatchery they buy from, you might be able to find out what breeds they make OE's from.
Tho it's pretty popular now so who knows<shrugs>
Looks like chick has a single comb, color and size will tell the tale if it's a male at about 4-6 weeks.