If you spot a delicate hint of wet dog, mouse or sticking plaster in your wine, then it's a fair bet you've had your first encounter with Brett, says TIM ATKIN MW. 'Brett can be difficult to spot,' he says. 'For certain wines - such as Napa Valley Cabernet, traditional red Bordeaux, northern Rhne reds and oak-aged Australian Shiraz - Bretty characters are almost part of the style.' He adds that with the trend towards unfiltered wines and riper styles, Brett 'may make cork taint look like a comparatively minor problem', seeing as reds made in hot climates, where natural acidity is low and a little sweetness is not uncommon in the finished wine, 'are asking for a visit from Mr Brett'.