I have a question that I cant seem to answer. Why is it that it is mostly cow milk that is consummed? Why can't I buy a gallon of goat, horse, cat, sheep milk at my local grocer? I tried thinking about acient civilizations and the uses for animals. Cows are just large things that eat all day, i guess they could carry stuff, same with goats (well minus being large). But horses can run fast and carry stuff and produce milk, they seem most logical for what we would be drinking today.