I had hoped to have your reply in time for out 1130 appointment with our vet to use as a second opinion. However we have now returned from the vet. She could not see the eardrums as the ears were very dirty and full of wax; so the first thing is for us to clean the ears and get rid of the wax. The vet gave an injection to counter any nausea and we expect to start some form of medication tomorrow once the vet has had a second look into the dog's ears, where hopefully she will be able to see the eardrums.
Like you, the vet thought that a stroke was unlikely and although she didn't confirm any specific issue, her diagnosis and responses seem to correspond with your answer.
What brings this on and what can we do to prevent it re-ocurring?
Thank you Rebecca,
I was expressing a hope not an expectation re response time. Hopefully our aged lady will get better in a few days.