
Basically if her hips were good when young then the core won't be affectd by much even in old age, but if her score would have been poor when young it would be likely to deterirate more when old if that makes sense.
I would send the plates of regardless as most vets can be way out with guessing the likley score. It will always have the date on any registration for her offspring so anyone looking up her details will know she was aged when she was scored and take that into acdcount when assessing the relevance.
A dog of my own breeding had a score only one point higher (8 in total) than his sister who was sored at a year, he was 6 at the time.