What pills from the vet are you considering? Reason I ask is a lot of vets don’t sell supplements as much as pain medication for arthritis. They are very different things and it all depends on what your vet has available. I agree with C4D; in order to get enough glucosamine from the food, you’ve have to feed enough food to create an obese dog, which would defeat the purpose entirely. There are a lot of supplements out there, from over the counter G&C you can get at Wal-Mart, to tumeric, right down to feeding raw chicken feet (or boiling them, discarding the feet and pouring a bit of the stock onto their food.) I had an extremely arthritic dog for many years, and did all of the above and then some but what really seemed to help him was Arnica (homeopathic). Every dog is different. Best of luck.
