
A few things I give mine are fish in oil, just tinned sardines or pilchards (once a week), obviously you may want to avoid tomato sauce as any level of solanine (found in tomatoes and members of the nightshade family) may exacerbate the arthritis. I also do my own blended veggies and add turmeric and apple cider vinegar, one teaspoon/capfull between two dogs for a week, so not huge amounts, but both promote healthy joints, and turmeric is an anti carcinogen. The other one which I don't use but have been recommended, is green lipped mussel extract. I also use glucosamine/chondroitin, just one tablet a couple of times a week with Indie, who has had slight lameness in the past on her front end, but also suffered a full cruciate rupture and has arthritis in that knee.
I have a spare bioflo collar if you want it? The clips a bit broken, it didn't make a jot of difference to my bitch Indie, and is somewhere in the outside shed if you want me to dig it out for you to try? Some people swear by them but they seem to be one of those things that sometimes work and sometimes have no effect.