The dogs are tested for positive reaction to medical equipment such as wheelchairs, crutches, canes and walkers; response to the «leave it» command to ignore food placed
nearby; acclimation to infirmities, demonstrating confidence when
exposed to
people breathing heavily, coughing, walking unsteadily and other distractions; responding positively to the «say hello» command, showing willingness to meet, be petted or held by a stranger; and finally, a non-aggressive, friendly reaction to children.
There have been studies on a possible link between aspergillosis and
people exposed to high concentrations of aspergillus fumigatus, which can cause it, such as those that work at large scale composting facilities and those that live
nearby.