Will he learn?

[lightchick]

SLWs mature quicker than most breeds so it's not too hard to judge gender. But most other breeds, the sex isn't apparent until around 16 or seventeen weeks at the earliest.

But if you're kind of thinking one of the Sussex is a boy and the other a girl, then compare them. Are the legs longer and thicker on the one you think may be a boy? Are the neck feathers more narrow and pointed on the "boy"? Look up pictures of a mature Light Sussex rooster and pay attention to the color of the saddle feathers. Then take your "boy" and part the feathers on his back down close to the tail and see if you see those colored pin feathers beginning to emerge. I haven't had time to look it up myself, but I assume Sussex roos have different colored feathers on their backs like most roos.

And watch for their combs to turn red before the girls'.

Don't worry about the play aggression you're seeing. It's harmless. And many roos raised together get along just fine. By the time they're six or seven months old, you'll know if they are determined to kill each other or live peaceably. I would relax in the meantime and enjoy what's left of their chick-hood.

My pullets even do the play aggression thing and sometimes they even do it with a roo, but not as long because they know they can't win.