I work in a public space (A public library) and this is becoming more and more prevalent and an issue.
The ADA states that
Only dogs are recognized as registered *service animals*
Entities must provide access for *service animals*
Service animals are defined as dogs that are individually trained to do work or perform tasks for people with disabilities. Examples of such work or tasks include guiding people who are blind, alerting people who are deaf, pulling a wheelchair, alerting and protecting a person who is having a seizure, reminding a person with mental illness to take prescribed medications, calming a person with Post Traumatic Stress Disorder (PTSD) during an anxiety attack, or performing other duties. Service animals are working animals, not pets. The work or task a dog has been trained to provide must be directly related to the person’s disability. Dogs whose sole function is to provide comfort or emotional support do not qualify as service animals under the ADA.
Some State and local laws also define service animal more broadly than the ADA does. Information about such laws can be obtained from the State attorney general’s office.
When it is not obvious what service an animal provides, only limited inquiries are allowed. Staff may ask two questions: (1) is the dog a service animal required because of a disability, and (2) what work or task has the dog been trained to perform. Staff cannot ask about the person’s disability, require medical documentation, require a special identification card or training documentation for the dog, or ask that the dog demonstrate its ability to perform the work or task.
Obviously this is being taken advantage of and I see it everyday. I've said no to cats, birds, and rabbits/cavies. However it is almost impossible and a slippery slope for a lawsuit to bring this up with someone with a dog, because if you do it to someone with an actual disability, you are toast.
These situations are also causing real harm to the people with actual service dogs, as they are being greeted with judgement based on the behavior of people who are taking advantage of them.
In addition to the provisions about service dogs, the Department’s revised ADA regulations have a new, separate provision about miniature horses that have been individually trained to do work or perform tasks for people with disabilities. (Miniature horses generally range in height from 24 inches to 34 inches measured to the shoulders and generally weigh between 70 and 100 pounds.) Entities covered by the ADA must modify their policies to permit miniature horses where reasonable. The regulations set out four assessment factors to assist entities in determining whether miniature horses can be accommodated in their facility. The assessment factors are (1) whether the miniature horse is housebroken; (2) whether the miniature horse is under the owner’s control; (3) whether the facility can accommodate the miniature horse’s type, size, and weight; and (4) whether the miniature horse’s presence will not compromise legitimate safety requirements necessary for safe operation of the facility.