
Your links keep crashing my computer MM :) The
side effects and contraindications are well understood in NSAIDs and I would hesitate to give to an elderly dog or one known to have gastric problems but weighed against that is the need to find effective pain relief and these are certainly that. Getting a dog with arthritis to the age of 13 is, I think an achievement Dakkobear :)
We used green lipped muscle extract for our Dandie in the early days which has good supporting evidence of efficacy but in later life is was not enough so, with a poor gastric history making me reluctant to try NSAIDs we tried
Cartrophen and found it very effective but that was only in her last year of life at the age of 14 and I do not know if it is appropriate for long term use in a young dog but perhaps something to consider with your vet.