"The Missing Link" is a powdered food supplement. My dogs are on the Missing Link Plus formula - it has glucosamine added to it as well. When I got Jemma she her breeder recommended a supplement - but the kind she uses is shipped up specially from Florida - she also recommended the Missing Link. After a month on it I saw a huge difference in Rupe's coat - ultra shiny, and he doesn't limp after too much running like he used to.
Here is the link if you're interested in more info:
http://www.trinatural.com/the_missing_link/index.php
Deb