I am thinking that it could have to do with insurance purposes... Also, the Allergy thing is A concern, as well as the people who do not like dogs !
I think you might be able to bring her if you can get A Qualified medical Doctor to write A letter why it is Important to have the dog with you. The better Qualified the easier it will be . In acuality, by law if A person has any type of Disability and A Doctor Supports the Claim , Asking for resonable accomadations is A valid way to go about it. It is something to think about.