Hi there.
I just wanted to share my experience of Librela.
My 15 year old collie had a number of issues with her pancreas and liver so our drug choices were very limited - pharma and herbal. She had extensive arthritis and we were most definitely in the last chance saloon. Our vet suggested we try it under the guise of why not, there is nothing left to try (we live very rurally and getting acupuncture or an animal osteo is actually impossible).
Long story short, we tried it and it was nothing short of a miracle - she was very much a free spirit and movement was very important to her. She was not a dog for sitting around doing nothing like a lot of BC's.
We had an amazing 12 weeks of her over Winter and Christmas where she was clearly not in pain and we had her younger personality back.
She suffered her third acute pancreatic attack in January and despite us catching it early, we were unable to turn her around and she was PTS - broke my heart but there was comfort to be had from those 12 weeks for us.
Our GSD also has extensive arthritis, its in her spine, paws, tail - she had her first jab today and by the end of the day, she was running whereas before, at her best, she could speed walk. She is exhausted from her efforts and snoring away on her bed in front of me

I hope this is a solution that works for us in the longer term.
I know it does not work for all dogs but for those in the last chance saloon or where drugs can't be used, where quality of life is sliding away, I think its worth a go if you can find the money.
The vets have had problems getting it - I spent a day hunting it down on line for them because I am like that

the prices were all around the 100 euros mark depending on volume which is based on the weight of the dog.
I hope this helps other owners - am happy to answer questions.