regular dog should be penalized? They are readily available and even say service animal https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=service+dog+vest

How would one do this? Are you okay with a special collar or tag that is visible and can only be aquired through the proper channels? How would one check that this is not also fake or made to look similar? A Generic ID card that the owner carries could easily solve this, but would you be okay with an employee asking kindly to see your card as you enter?