The company is interviewing the candidate as a potential employee.
The candidate is interviewing the company and a potential employer.

It's a negotiation of equals - both parties should be able to get legitimate concerns aired and addressed so that they can each make an informed decision. With the possible exception of the 'bring you dog to work' question, I don't see why these shouldn't be legitimate enquiries. Better to get them on the table up front, than to have these become issues down the road. Ms Hall needs to realize that 'at will' works in both directions.