Dog Yoga by ErharYaksaa - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=62034151 A third of Brits have tried out wacky fads, including screaming therapy, dog yoga ('doga')and drinking saltwater, according to a new survey. A survey of 2,000 adults found almost half have tried drinking apple cider vinegar, a well-known fad…