I had to buy a herd share to get raw milk, so I own a portion of a cow. It is an hour drive to the farm to pick it up; I share driving with others. But it tastes so good and has helped my health, so it is worth it. I make creme fraiche by putting milk in a jar, adding a tablespoon of buttermilk, then letting it sit on the counter for a couple days. I make sour cream the same way, milk, a tablespoon of sour cream, let it sit. Then I use a tablespoon of that batch as a starter for the next batch. That way, I know what is in my food.