Sorry everyone for not responding sooner, I've been swamped with other things and forgot that I post this thread. I found out the sexes of the chickens, they're a bit older now and have more feathers. The large barred rock (Sunny) is a boy and the small barred rock (Greta) is a girl.
Here are...
I've never owned chickens but I think the big one is a boy (Sunny) and the little one is a girl (Greta). There is a mix of all different ones but as for the Barred Rocks there are large and small sized ones at the farm. I'm really sorry the pics aren't better.
Sunny:
Greta: