They are the only animals legitimately trained as support animals.
Those are service animals. Service animals for blind should be allowed anywhere.
there are other support animals besides seeing eye dogs but using the excuse that your pet is a support animal has become so common that something has to be done. My aunt would foster pups that were in training as support animals and these dogs get about a year of training before they are given to there owners they also will be replaced or retrained if they are not doing the job...am emotional support dog has no training. the designation is for the person not the animal.
Para and quadraplegics often have service dogs.