...not considered high risk breeds, but on the other hand, aren't puppies, either. I think that you could start them on glucosamine etc. at any point. You could ask your vet, but usually the suggestion is over 1 year unless the dog is born with a problem, or is a high risk breed.

High risk breeds are generally larger breed dogs, or dogs that have unusual body shapes, like basset hounds, dachshunds, etc.

I feel as if there's no reason to wait until there's a problem, though it does help even then. Mine are an example - one has a problem, one doesn't seem to.

Plus, it's difficult to tell early on if they have a problem. It's not natural for dogs to show pain. If they do, then it's been there for a while. (Unless, of course, there's been an injury such as a fall.)

I don't see any reason why not.