When rescue dog Chloe is not tumbling across the grass on a farm outside India's tech capital Bengaluru, she is learning to sniff human breath for cancer with a little help from AI. Fitted with a 3D-printed helmet and harness packed with sensors, Chloe is part of experimental efforts to use dogs' extraordinary sense of smell to develop a non-invasive test for the disease. - Dog 'work-life balance' - India has described cancer as a major public health concern, saying one in nine of its 1.4 billion people are likely to develop the disease.