Sunday I became the proud foster parent of a 1-2 year old male with a broken
(but mending) hind leg. The caretaker of this cat (among many rescue cats;
she founded an organization) said she believes cats with broken bones have a
propensity to develop arthritis, and she wanted to put him on Glucosamine
(Chondroitin) to help prevent this. She was clear that it wasn't a proven
preventive medicine, but she feels it might help. I know many humans take
this and claim results. I googled a bit and there does seem to be a lot of
anecdotal support for the stuff, for cats and humans alike, for starters.

Can I buy this cheap at Wal-Mart and give it to my cat? Anyone know how much
is the right amount or have a quick web site citation that discusses this?

Kind of an update:
As some of you may recall, I lost my little cat March 23. Sunday I went to
PetsMart "just" to look at the cats that a certain rescue organization in my
area brings in every Sunday for adoption or foster parenting. I got into a
chat with the founder and mentioned that in a few years or so I might adopt
another cat but he/she would be an older one with an injury who presumably
would be less wanted. She said she had an adult cat back at her ranch who
had recently broken its leg. She invited me to drive the few miles to meet
him and consider fostering. I said I had to think about it for a few
minutes. She was cool about it and wasn't pushy. Long-story short: He's a
gentle affectionate fellow who makes me very happy and whom I hope I am
giving good care. We see a feline orthopod specialist on Thursday, paid for
by the Rescue organization, as the Rescue org is weighing whether an
operation might help. I cover food and kitty litter and will also probably
buy the Glucosamine, as it doesn't appear expensive when purchased at, say,
Wal-Mart. I'll ask the vet for more info on Thursday, but I want to be
well-prepared.

TIA