I love it.... I am not a nutrition expert by any means. I just know what I have seen. I actually got the info. from a client of mine who uses it. When Chase was alive, he started getting arthritis and was limping. I used several types (human/ and animal) gluc. and chon. formulas. NOTHING worked. I bought the Missing Link PLUS (which is the joint formula) and within 4 days he stopped limping and was a lot more active. I was a bit pricey at the "dog bakeries" but I have seen them sell the "vet" formula...that has the "PLUS" for $10.00 cheaper.... Since then, I have recommended it to clients and so far they all love it. My bag was almost $30.00, but it lasts a long time, depending on the weight. So far, I swear by it, because it worked when nothing else did. But, every dog is different...I would give it a try and if you don't like it, then you can always find something else. I would also give him 500mg of vit. C, Omega 3 fish oil with it.