Dog suppliments–do you use them?

Our dog, Vance, is getting a little older (he’ll be six this year), and since he’s a big dog (a yellow Lab), I worry a little about his joints and wonder about the effectiveness of vitamins for dog. I want to make sure that he has plenty of mobility and pain-free joints as he gets older.

I’ve been looking into dog suppliments and thought I’d post here to ask if any of your use them with your dogs. If you do, what do you use? And does it seem to be making a difference? If you don’t use vitamins for dogs, is there any particular reason? I’ve always believed that a healthy dog food would mean there was no need for dog suppliments, but now I’m not so sure.

I’m looking forward to knowing the approach you take with your dog and I’ll be sure to share what I turn up in my research about vitamins for dogs along with what we decide to do for Vance.