I mean, deer (and cows and goats and sheep, but not horses) are ruminants. They can eat all sorts of things humans can’t digest: grass, tree leaves, most weeds, etc).
The evolution of the rumen was one of nature’s best tricks.
Grass fiber isn’t digestible by humans, but the rest is. Juice, roots, flowers, seeds
Grass fiber isn’t digestible by humans, but the rest is. Juice, roots, flowers, seeds