Pessimistic Dogs Are Better at Smelling Cancer—And Other Keys to Disease-Sniffing Success New research is revealing how disease-smelling dogs can excel By Rohini Subrahmanyam edited by Sarah Lewin Frasier Individual dogs’ personalities, and how we interpret their behaviors, may be key to disease sniffing at scale. Billy, a floppy-eared little beagle, darts around a platform…