It is very unfortunate that with even with the best of intentions some people just do not get it right. This is the case with either misunderstanding, naivete, ignorance or just not wanting to know the facts as in the case of the use of dogs for sniffing out mold. Everyone know that our four legged friends are great at sniffing out odors since their survival depends on it more so than for humans. And yes in many cases humans employ animals for their ability to find lost children, search for people trapped under rubble, sniffing for bombs or illegal contraband. These uses are acceptable for there is little to no risk to animals. But in the case of checking for fungi and especially toxic and infectious molds the animals are using the system that is the main port on entry of toxic and infectious molds and that is through the respiratory system.
Medical research is clear and all one has to do is take a quick look to see what it is all about: