TAMMA, it could be the ups and downs of the weather we're having. The days are starting to lengthen but laying in my flock has been patchy and sporadic as well. If they're directing most of their energy to staying warm or regrowing lost feathers from a moult, it's expected production would drop. You could try hanging a lightbulb in the coop to simulate longer days and see if that brings them back into production. Is there a nearby threat that might be bothering them, like a new barking dog that moved in next door? Stress can make them go off of peak form, too. My husband likes to have people down to target shoot and for a few days after the hours of gunfire, my chickens seem to hold back on the eggs.
What's your feeding program like? That might be another area to consider- are they getting adequate nutrition and access to water each day? It can be hard to keep water in a liquid state for everyone to get her fill, so if the waterers freeze over before all of the hens have had a drink that could impact production, too. I don't heat my waterers in the winter (somehow the equation of water + electricity + coop = ? just doesn't sound safe to me) so I have to change them out during the day and bring them in at night. I'd give your hens a chance through spring to show what they can do in favorable weather conditions.
I don't know what you might get from your cross but someone else may.
There's nothing new that I can tell,but with chickens you never know I guess. I feed them in the morning when I go and open their coop. At least when it's not too cold I open it. I give them water in the morning and usually in the afternoon as well. I do have electricity in the coop hallway. It was a shed that was converted to 5 coops. I hope they start again in the spring, they have such pretty eggs. Thanks!