You most likely do not have Araucanas, more probably Easter Eggers which are a mongrel with some Araucana genetics in the mix. Araucanas have ear tufts and show types have no coocyx(tail bone).
They may not lay well due to age or they are ready for molt, or they are just not of good laying qualities?

What fanci said, also check to make sure that they are healthy and aren't infested with some kind of parasite, coccidiosis, etc. How old are these hens?

Velvet ~:>

Yes they are perfectly healthy, and so are all the others in the coop. All my hens are about 14 months old. I guess you could call them "Americanas"?

Just nit picking now!
Ameraucana is a breed, they are related to the Araucana but they have full tails, beard/muffs and no ear tufts as the Araucana. Americana may be appropriate as it refers to something typically American! It wouldn't matter what anyone called their chickens or dogs or cattle, except it may be mis represented to the next in line to acquire it. I would be quite upset to send off $100 for a pair of Amaraucanas, or Araucanas and receive some crossbred mutt Americanas or more properly Easter Eggers. Maybe you truly do have Ameraucanas? But if they came from a commercial hatchery, they are not likely to be that. They still make interesting pets.

Mine have muffs and full tails also, and they lay green eggs. So they are either Americanas or probably easter eggers i guess, who knows or cares, cause it's not like I'm going to sell their chicks or anything. What color combos do americanas come in? Two of mine are what I would describe as a cheetah type pattern with dark heads and greenish gray legs, muffs, full tails, while the other is the same only more smokey gray with a head like the others.