Thanks for your comments @awakentolife - you've made some very interesting points! I really enjoyed writing and researching this because it's such a fascinating subject. I really agree about the way many farm animals are treated. I used to think goats were raised in better conditions, because they are farmed on a smaller scale, but then I found out that goats are generally treated the same way as cows on farms, raised in a highly controlled manner in quite artificial conditions.
I think it does make a difference, as Isle of Mull cheese is one of the most delicious cheeses from Scotland, and the cows that produce it are raised organically in free range conditions. This is just one example I know about, because I used to run a cafe, and my Isle of Mull cheese sandwiches were incredibly popular!
I buy my eggs and vegetables from an organic company, and I've visited the farm - their chickens live out in the field, as do their pigs (although I don't eat meat).
Though I'm not sure if this is the reason for the difference in A1/A2 milk. I've read that it's believed that cows started to produce A1 milk between 5,000 and 10,000 years ago, when people started migrating with them to northern Europe. This opens so many fascinating possibilities, and I want to learn more about it. There are so many questions in this whole topic.