In A Dance In Fire it mentions them drinking both fermented milk which is http://en.wikipedia.org/wiki/Kumis, and fermented meat juices which can probably be made http://en.wikipedia.org/wiki/Garum
So, why reply to my post to say that?
It's also obvious that the green pact is only valid for the plant life of Valenwood (you know, the place with the walking trees), since they do import lumber and other plant materials into it from other regions.
Not exactly, the green pact just restricts the wood elves from using the plants in Valenwood themselves. They can still profit from logging camps. Pocket guide below.
The use of woodcrafts created by another race is not forbidden, nor is the sale of their own Valenwood timber as long as it is collected by a non-Bosmeri.