The practitioner would need to provide documentation that each support animal alleviated some symptom of the disability."

You want to know the cause and not just the symptom. 

In other words, does the animal work, provide assistance, perform tasks or services for the benefit of a person with a disability, or provide emotional support that alleviates one or more of the identified symptoms or effects of a person's existing disability?

His doctor prescribes John a dog to help alleviate some of his symptoms.

In other words, does the animal work, provide assistance, perform tasks or services for the benefit of a person with a disability, or provide emotional support that alleviates one or more of the identified symptoms or effects of a person's existing disability?

This is an extremely wide law that covers everything from diabetes to food addiction to you name it. 

Mold is a symptom of a greater problem.

However, the best example is that airlines no longer are allowed to ask for proof that a service animal is required.Plus, because the use of service animals have extended so far beyond the previous scope of assistance animals, it becomes a quagmire as you get into situations where diabetics use dogs that can detect an oncoming blood sugar crisis before a blood test; people with seizure disorders have dogs who can detect an oncoming seizure, which medical science can't outside of an MRI/CAT/EMG; and therapy animals used to calm people with emotional &/or psychological disorders.  

(who is not a licensed mental health professional) that her young son has attention deficit disorder and a service animal would mitigate the symptoms he is experiencing. 

Basically any inspector looks for the "signs and symptoms" of a failing foundation.