Silly Kiki, you put the milk down the well to keep it cool for a week. Use it or make buttermilk to keep for a another couple of days. Cheeses and yogurts are simple ways of keeping milk "good" longer. Maybe not good, how about edible?
Remember the old saying, "use it or lose it?" Sums it up nicely.
Also, refrigerators have only been widely available & affordable for the last 50 years or so. Before that were the ice boxes that had to have ice delivered daily. Grandpa told me stories of when he was an ice delivery man. Rough life, neat stories.
Uglyduckling - google outdoor ovens and you can make an oven out of bricks for bread baking. Just like rjohns39 did in the 18th century, if you don't have a campfire dutch oven. Works great, by the way.