The defective bottles were the Roséand the Grand Vin. Getting back to the four wines that I tasted from Gold Hill Winery, I tasted their Chardonnay and Roséwines together, and then their Grand Vin Family Reserve and Cabernet Franc together. So it is not that uncommon and it can happen to any winery. If it is closer to 8%, then 1 bottle out of every dozen would be faulty.
Overall, I believe I read that 3-8% of wine bottles have some sort of a fault. A common problem is from corks, which was worse many years ago, but now with more rigorous testing the number of faulty corks is reduced. There are many kinds of things that can go wrong and cause a wine to be faulty. How can you tell? Did you know that you can tell the restaurant and get a replacement bottle at no cost for a defective bottle? The same for a BC government or private wine shop. When you are in a restaurant and order a wine, you could get a wine that has a defect. Twice during my tasting, one of the two bottles had a defect, so the wine was not review-able. I received a shipment of wines from Gold Hill Winery in Oliver, BC, over the summer and I’ve been tasting them two wines at a time and writing my tasting notes for you. Why 2 Reviews of 4 Wines? Gold Hill Chardonnay 2019, Cabernet Franc 2015, Rose 2018, and Grand Vin 2014