What breed Is this?

[debid]

I don’t doubt it could be a black sex link. But even though it’s small, I still think it looks somewhat like a Jersey Giant.

If she keeps growing and is bigger than the others by her first birthday, then you'll know. I don't think hatchery JGs get as large as breeder JGs (more of that representative disclaimer) either but I would still expect *some* difference.

Unless you are planning on breeding, it doesn't much matter, anyway.