>> reporter: rob marciano, cbs news -- silver spring, maryland. >> john: why california winery ownersling out their hair and pulling up their grapevines next level dog people give their dogs next level protection with nexgard plus. one and done monthly parasite protection against fleas, ticks, heartworm disease, roundworms and hookworms use with caution in dogs with a history of seizures or neurologic disorders. get next level protection with nexgard plus >> john: you might want to put down that glass of wine for the next story or hold onto it lest you spill a drop. that's because a new report out today says california's wine supply has dropped 24% compared to the year before. it's the lowest hall in nearly 30 years. to help explain why we turned to elizabeth cook for tonight's interview. what does this report say more broadly? >> reporter: here in california we make 80% of the countries why in. today's report further underline the troubled industry is is in right now. according to the report the amount of grapes crushed to make wine is the lowest it's been in two decades, down 24% ov