It sounds reasonable to me that this is the situation, except perhaps in very
small farms. History has taught me this: whenever humans have physical control
over other humans, they tend to abuse their subjects in terrible ways.
Slavery. The Holocaust. Gulags. North Korean concentration camps. It seems to
me that the way we are treating animals is simply a manifestation of this
tendency toward sadism. It is not difficult to find recorded evidence of pure sadism playing out both in small and large farms. Since I have no way to verify a given farmer's claims, I will not take the risk.
Second, a well-balanced, strictly vegetarian diet is far more healthy than a
diet that is based on animal products [1,2]. I know that many people do not
believe this, and they base their views on the vast amount of disinformation
that is out there. To get to the truth you have to listen to the experts. The
book  I am citing was written by Dr. Walter Willett, one of the leading
researchers on the relation between nutrition and disease. His recommendation
is basically to eat as I suggested above. More precisely, he recommends (based
on decades of research) to reduce animal-based foods as much as possible, and to
reduce processed foods in favor of whole foods. There are of course additional
recommendations that I will not go into.
The research shows that more than a little meat is not healthy (unless you have no better alternative), and there is no harm in not eating meat at all.
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