Fermenting tanks

Fermenting tanks at Sterling Vineyards. The wine ferments in these vats for several days (depending on whether it is a red or white) and then it is transferred to wood (oak) barrels. Strangely enough, we saw about a dozen cats roaming around down there. When we asked the guide about them, he got kind of nervous and muttered something about "organic control methods". Not long after, all the cats ran under one of the tanks as if they were chasing something.