Bigger problem than unsanitary conditions are the health of the cows. A lot of the slop given to cows in feed lots in that era was stuff like spent leftover barley after it was used in beer making. Not exactly fit for proper consumption at that point and resulted in sick animals.
The natural ecosystem within raw milk keeps it sanitary and actively kills bacteria that gets into it, though cleanliness is still an important factor.
Bigger problem than unsanitary conditions are the health of the cows. A lot of the slop given to cows in feed lots in that era was stuff like spent leftover barley after it was used in beer making. Not exactly fit for proper consumption at that point and resulted in sick animals.
The natural ecosystem within raw milk keeps it sanitary and actively kills bacteria that gets into it, though cleanliness is still an important factor.
Distillers dried grains are still a widely used feed component. High in protein, fat, and fiber.