Different chickens molt at different speeds. Fast molters dump a lot of feathers at one time and look really ragged, but they get over the molt in a month or two. Slow molters just lose a few feathers at a time and may take 5 months to finish a molt. You might not even know a slow-molter is going through a molt just by looking at them. You’ll just notice a few extra feathers laying around and they stop laying.
Some hens will return to laying when they finish the molt, whether you add supplemental lighting or not. Some will wait until the days get longer. Some hens are better winter layers than others. They are all different.
Stress can cause them to stop laying. That raccoon attack could do it or maybe the pecking order being shaken up because some chickens were removed from the flock could affect egg laying. Usually they get over that in a few days but that stress might cause a mini-molt that can stop them laying longer.
There are several things that could cause them to stop laying. If they are going through a full molt, two months or longer is not unusual. But no, I don’t know for sure what is happening with your flock.