Arcaunnas - When will they lay?

[Sgsf]

I have two, and they are both about 5 months, when will they actually start laying? I was going to put an egg out there today, and see if it be missing the next time I check, but I currently don't have any eggs to test with. Is it possible BOTH hens are eating their eggs, or they just need a while longer to start laying?

How long would you guys think it would be before they start laying?