If you want to try anti-inflammatories you can use w NSAIDs, boswellia and turmeric are good ones to always give w food. Turmeric can upset some tummies, though. Ginger is a great antiinflammatory, too. I often use a combo of boswellia, mangosteen, ginger, and turmeric (called Inflatame by Jarrow.)
I wonder if you could just call a rehab specialist and ask about the use of strict rest in your case. I know that it's been a standard protocol for many years but they're finding more and more that it doesn't promote healing any better than allowing normal activity, and things like decreased circulation actually hinders tissue repair. I'm sure it all depends on the case, but even stuff like heat packs can be really helpful and they may be able to give you some very basic guidance?
I agree that tramadol plus NSAID might be too effective for pain—but it will allow you use less NSAIDs. (I think it's something ppl try when the objective is better pain management using as little NSAIDs as possible.) Maybe you could try melatonin or theanine for nighttime if he needs an extra bump? That's what my rehab vet suggested for when MP was grunty at night and early AM, although I'm not sure if it worked any better than a homeopathic sleep aid.
what really does seem to help for night/am is DLPA—no more morning grunties. (Also safe w NSAIDs and most things except MAOI type meds; works to block pain receptors, I believe.)
Sorry if full of typos—phone typing is sucking this morning!