I got a little lazy typing- the supplement I give the pugs has glucosimine and chondroitin in them.  Sometimes I use one that as MSM as well.

Chondroitin Sulfate (in some forms) is a component of cartilage so is suppose to support cartilage in joints. It also may have some anti-inflamatory properties.

MSM is actually sort of like DMSO if you are familiar with that solvent.  (I looked this one up once because me vet kept recommending it).  This one supposedly has anti- inflammatory properties, but that is disputed, or at least has not been definitively proven.  In the information I have seen there have not been many, if any side affects reported from its use, but there is not much long term use information available (at least last time I looked).

I'm not sure about using them individually- I have used supplements with G and C together, or all three together (for both me and the pugs).  Some people and published information say there is no benefit from these supplements, some say there is.  I have seen benefits, and no side affects from using them.  I have had problems with using NSAIDs long term (in me) and Maggie couldn't take them because of kidney issues.

Fresno is pretty far from where we usually meet in Mill Valley.  Keep us in mind if you are wandering up this way sometime.

Karen