they are disability assistance animals that are differentiated from pets by having been prescribed/recommended by a licensed healthcare professional (ie, physician or pscychologist/therapist).enter pet therapists. they might prescribe a pet (or petS) for xyz reasons. but the moment the pet is prescribed/recommended it seems a pet obtained or used for that purpose transforms into a support animal, and is protected under provisions of the ADA.with service and support animals, proof of need is required (especially in NO PET policy units/buildings) in order to document that we are not discriminating against any other tenant(s) that may want to have an animal as a pet (as opposed to as a service or suport animal).enter the likelihood that we will likely be given a prescription or recommendation letter that at bare minimum will indicate the tenant has some sort of disability, plus may or may not share what physical, health and/or psychological condition(s) the animal was indicated for, or in the case of more than one support animal, which symptom each pet assists with.a predicament?

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.