hello,my boy had his cruciate operated on a couple of years ago-sadly it looks like the other one is on its way out-i currently feed him on arden grange large breed food so it does contain some vitamins,he has been on synoquin-im looking for a better alternative -if there is one ,my brain is overloading as there is so many on the market-my vet says not to give human supplements as they are not for dogs and there is no proof of what is actually in them etc,ive been looking at msm,glucosamine and condroitin,green lipped mussel the list goes on,just wondering what other peoples experiences were,just trying the best way to help my boy x:yikes: