Oh my, it's
so dreadful isn't it when our babies get older, and we notice all the differences....
Not with Harry, but with Rosie our Labrador - we tried Metacam but it didn't seem to make that much difference in the long-term, it worked for the first few months but then I think her body kind of got used to it.
So we put her on Glucosamine supplements - it eased her arthritis within a week or so, and generally gave her back a little of her old 'bounce'.
Might be worth just looking into? I'm so sorry you're sad....Sally x