Hens in question, just two, are American Dominique. Photoperiod I think is not the problem. Even older game hens under same care regimen are in lay. Diet is 2/3's layer pellets and 1/3 game bird starter with a dash of paprika so based on literature diet is more than complete. They also get about 2 hours free-range foraging time every second day where they really target greens like all hens in lay do. No fart eggs have been produced by either hen this year although they did produce them at end of the 2017 laying season.