I couldn't believe it when I heard about mold-sniffing dogs but there are such animals and they are highly accurate at sniffing out mold in our homes. In a recent article in the Conneticut Post:
"Because of a dog's excellent sense of smell, they can pinpoint where mold is located in a building," said Carl Massicott, the co-owner of Advanced Mold Detection on Mark Street. "A trained mold professional is usually about 35 percent accurate, while a dog is more than 97 percent accurate."
It takes over 1,000 of training to be certified as a mold-detecting dog but given the amount success rate the dogs have compared to human inspectors, it's well worth it.