Every dog owner will tell you that their four-legged friend is brimming with special qualities. But in the case of this labrador-cross, it wouldn’t be empty boast. For Blat is a pioneering dog with a powerful nose. He is one of just a handful of canines in the world – and the only one in Spain – that has been trained to detect lung cancer. And he can do so from just a whiff of the breath of someone suspected of having the disease. According to a study published in the European Journal of Cardio-Thoracic Surgery, Blat had a success...