I am not even close to as knowledgeable as you all seem to be, but in response to the idea of raising animals for more than just your family, chickens and turkeys (specifically midget whites, but wikd turkeys work also) would seem like a great fit for a food forest. They can be great foragers and like to roost in trees. The greatest challenge seems to be keeping out predators. Training them to return to the coop each night and locking them in solves that for the most part. I love my cow and goats (goats are also browsers very happy in wooded areas, but do more damage than the birds, so might not be a good choice in a small area) but chicken and turkey are awesome as well.
