Although unintentional, not getting through a gallon of milk before it starts to sour can happen, no matter how rare. It was more common before refrigerators became standard appliances in homes, which ...

If you open the carton of milk and discover it is sour and not yet spoiled, the contents are not destined for the drain. Sour milk doesn't smell rancid or look moldy, but it is in its early stages of ...