I noticed in your earlier post that some of your hens are 3 years old. Typically, the older the hen, the longer the break they take during the winter. My 1 1/2 year old hens typically begin molting around October and start laying again in early to mid-January, taking 2 to 2 1/2 months off from...
Considering they were nutritionally deprived and physically stressed during their earlier development, this delay in laying is normal. To help them catch up, I would put them on a higher protein ration, like Purina Flock Raiser (20% protein). You'll have less feed waste if you use pellets...