There is a reason we expend so much energy and care in looking after wheat and chickens. It's so we can eat them.
An animal on a farm might be treated well (at the discretion of the farmer) (until they are slaughtered), but they aren't free. An animal in the wild has freedom, but not security.
America heavily favors the latter, or at least it used to, times may be a'changing.
An animal that gives up its freedom for security deserves neither.
I agree that the original metaphor was inappropriate because it compares people to domesticated animals and crops that have no free will and would not exist without the farm, not to mention the personal freedom implications of equating citizens to domesticated animals.