(Wines&Vines) - A whirlpool in a wineglass that would likely affect only a few wineries in Napa County has unsettled the cooperation between growers and wineries that has long been a major strength of the county’s wine business. Tighter enforcement of existing rules and applications to substantially increase wine production at two wineries have inspired a new look at a long-dormant aspect of the county’s 1990 Winery Definition Ordinance. Among many other provisions such as outlawing weddings and corporate meetings at wineries, the ordinance allowed the approximately 250 existing wineries at the time to continue sourcing grapes from outside the county to make wine.