(Bloomberg) -- Ziggy, a golden Labrador trained to sniff out bad wine corks, is showing off his tricks at Sojourn Cellars’ tasting salon in Sonoma. I’m visiting this charming white clapboard house to find out why owner Craig Haserot is thriving when big-name Napa wineries are discounting their cabernets 30 to 50 percent to clear inventory.“The main thing is that from the beginning we’ve sold 70 percent of our pinots and cabs direct to consumers online,’’ says Haserot. Ziggy wags his tail.