this stuff works!
My rescue, who is at least 12 but maybe 15 or 16 (judging by how much she's slowed down in the last year) has been on librela shots monthly from the vet for the past year.
I thought I'd give Flexi9 Joint Plus a try and it HAS made a big difference...so much that, due to traveling, I accidentally skipped a shot and couldn't tell the difference.
Now, she's still not keen on walks that are longer than about 5 minutes, but on there's a lot more happy scampering going on around here now that she's on Flexi9, so I know she's feeling more energetic and less pain (one can even hope for no pain!) And she can do the stairs at a normal pace instead of up one....hold...up one....hold. So we'll keep her on it!