Animal systems

I was trying to ask on your blog comments but the recaptcha is broken. What plants do you grow to feed your livestock? If there is one topic that is notably incomplete from permaculture it is information regarding animals. Very little information is given on edible plants, less is given on palatability/toxicity and nothing seems to be know about free range systems. Ironically the least diverse section in permaculture is animals and largely they are confined and fed by labour intensive cut and carry.