I'm using both NWNL and the Permafrost mod, which I both love, but I've come to the realization that when all the water freezes over, all the wild animals have no source of water (besides all piling into my base to steal my animals water from their waterboxes). Hopefully this wouldn't be the biggest change in the world, but it'd do a lot to make these two mods more friendly if wild animals could 'eat' snow on the ground to replenish their water needs