So we are discussing the origins of a farmer's manure?

Personally, I don't think it matters one hoot if a farmer uses manure from his own cattle or the guy 10 miles away who free range grazes. 20-100 acres of farm is a lot of land to compost, highly unlikely a farmer can do it all himself, raise the cattle and tend the tomatoes, and my guess is that the label 'bio-dynamic' is just another way to raise prices for the same quality produce you can get from any good quality 'organic' farm. And personally, I'd prefer the small farm to the big one any day. It may be a labor of love from the standpoint of novelty but novelty wears off. Lots of love is surely lost after the 5th or 15th acre of tilling, picking bugs, composting and watering on a daily basis. Mostly it's just a lot of labor.

I still insist they are the same thing. The only difference is rhetoric. Instinct telling me that some really big farms somewhere with major acreage to raise a lot of cattle are using this as just another way to drive small farms into the gutter once more.

People garden in NYC and London btw, living in the country is not a requirement. Lots of people in cities even grow tomatoes on their fire escapes. I had a friend who made compost in his city kitchen with 5 gallon buckets. We gardened on a vacant lot in a city in VA for about 4 years as well. Here, I am also part of a community garden. Where there's a will there's a way. Also kind of nice to have neighbors to trade produce with.