Hi EW, good to hear from you. I'm glad you and your flock are doing better now, after your illness and their moult. How old are they? Pullets in their first year usually stay in full lay throughout their first winter, without moulting at all, but older birds usually stop laying in Autumn before moulting, put all their energy into growing new plumage over the next few weeks, and then take a rest until after the Equinox. They seem to be very sensitive to even slight changes as the days begin to lengthen in January, and often begin laying well by the end of the month. So yours are perfectly normal, just be patient!
Because eggs are available all year round from young farmed hens, or flocks kept under electric light to stimulate lay, we tend to forget that eggs are mainly a seasonal food, and our garden hens do need a break at some point. Commercial hens have as many eggs as possible wrung out of them in their first 18-24 months, and are then all culled and replaced. Our pet hens will usually live longer and go on producing eggs for several years after that, at a more natural pace, especially the purebred types.
It's good to give a mineral boost during and after the moult, try Nettex mineral powder with probiotics and seaweed, to build up their reserves before the new season starts.