Did some research:
Discussion
I don't think chickens are worth the effort. I have seen someone do it with massive compost piles and a tractor though.
Pigs are incredible converters of excess plant calories into meat.
My aim is resilience from supply shocks as well as low pufa meat. This summer I should be able to take my Taro & Casava production up a notch. I'll soon see of it's enough to raise a few pigs, should be interesting.