No, if you have two smooth feathered birds (non carriers) they will not produce frizzles...but you can have a bird that is smooth feathered (in appearance) and it still can carry the frizzle gene. If you breed two frizzles together, you will get "curlys." This is not desirable. Having two completely frizzle birds bred together, you will end up with offspring that will have trouble keeping their feathers because they will be brittle.