Sorry, I can't answer. Not sure.
As far as I am aware they have one room set aside for a family with a dog. It is a very nice room with its own stair access. Dogs can be taken into the bar/lounge area but not the restaurant. We have stayed twice at the Inn and enjoyed our stay on both occasions. It is a good base for many dog walking adventures.
Get an answer from The Inn on the Tay staff and past guests.