I read an account of training a dog to find hidden mold problems in buildings. (It’s in Mold Controlled by John Banta.) Dogs have a better sense of smell than us, so they can sniff for mold effectively. In short, if you want an exceptionally skilled dog, it takes a lot of rigorous training. This also applies to other types of dog training.
This is a companion discussion topic for the original entry at https://criticalfallibilism.com/mold-finding-dog-training-and-induction/