I would have to dig out my records, but their sisters (the younger ones) are laying now, just in the last couple of weeks. I have been getting a handful of Cornish eggs for a couple of weeks from all but one pen. They will be smaller eggs, their pullet eggs are about the size of a bantam egg, then they only lay about a medium sized one once they mature more.
The one with the blackish legs is an older girl and from 2014 hatch. I think one other was as well?
They are neat birds, very different from other breeds in very many ways.