Scientists at the University of Kentucky reviewed studies on bed bug detection dogs and concluded that although expensive for operators, they are a reliable source as long as they undergo the proper training. In another study, detection dogs had a 97.5% correct positive indication rate on identifying bed bugs ("Cimex lectularius") and their eggs – with zero false positives – all while accurately distinguishing them from carpenter ants, cockroaches, and termites. They also successfully differentiated l ive bed bugs and viable bed bug eggs from dead bed bugs, cast skins, and feces with a 95% correct positive indication rate.