[gcruse]

 
Glucosamine and Chondroitin sulfate used in a normal
dog will postpone the effects of arthritis in both humans and dogs

Hmm.  And just how does that work?  ;)

As for contraindications, too high a maintanence
level will make for a stiff neck, pain when rotating
the head to the far left and the far right, and
stiff, painful shoulders.  I assume if the dosage
is kept up the pain/stiff joints will eventually
spread to the whole body.

[vetvetdoug]

After I posted it I read it and realized the gaffe. You weren't supposed to catch the error....However, the better the dog feels the more exercise the owner should get and therefore help decrease the arthritis in the owner. How's that for Clintonspeak?