Stop here if you don't want to hear an (educational!) rant.
Cattle are an excellent start to a good healthy farm. The grass converts sunlight into consumable energy, and the cow (multi-stomached animal) converts this grass into meat and milk. We have been harvesting solar energy since the beginning of time! The cows and goats create manure and urine for the ground to absorb and start the cycle over again. By introducing grain into their diets we have disrupted that natural cycle. We have more sick cows and dangerous levels of harmful bacteria is introduced into the system making it unsafe to consume. The milk has to be pasteurized now that the animals are not healthy. We have a whole new strange food system that is based 100% on the consumption of fossil fuels. It doesn't have to be that way. I am not against the use of machinery and technology by any means. I love having a front end loader on my tractor to move compost and mulch, but I don't rely 100% on machinery to grow food. If I had to do without the tractor, I would be just fine. Would our food system be fine without the large machinery? I'll let you answer that!