Yep, have seen that here too, can help to have the nipple tipped down so that lip drains.
How warm is the water?
I use an aquarium heater so water temp is ~68°.
Have had some terrible FB here, consider it pretty much inevitable.
Especially when they nosh on the snow banks and nip their wattles...
It does not, in fact can inhibit it.
Multi aged flocks can be tricky. Hopefully your pullets will start laying before the light gets any shorter, then they should lay all winter with no lights, especially if they are high production breeds.
I stopped using lights in the fall so the older birds...