[yorkiemini]

They can only ask what service(s) your dog performs for you, and the trick question, is your dog a service dog. If you state yes your dog is a service dog and it fails to perform or behaviors in any way suspiciously or other than how a service animal,would be expected to then you are liable for fraud or in some states felony. The TSA is becoming more aggressive in its evaluation of service dog and there is a case of terrorism charge for someone who was caught with a fraudulent service dog on a plane. Airlines are starting to take a harder line on ESA ( emotional support animals).

Part of this stems from the situation that they will only allow a certain number of dogs on each flight and several dogs on a plane can be problematic for passengers and flight crew. Plus if some one fraudulently brings an animal that is not individually trained as a service on a plane it means someone with an authentic service dog was not able to get on the flight.

They cannot ask what your disability is but having medical documentation can help. There is no registration for service dogs so don't get sucked into that.

Important to remember the ADA is American only. The rules and laws totally change in other countries. And some states have additional criteria for service animals.

Because the ADA law is vague in many areas it makes the legal cases that do come to trial especially contentious and damages all service animal standings.

We are all eagerly watching the recent incident of the large dog that pooped so many times in the cabin that the flight had to make an emergency landing (apparently due to the odor and the flight crew doing constant clean up duty).

In service dog schools this situation is covered.