There is this quite milk revolution that has been happening in India for the last 30 years (or more i think). http://www.nddb.org. A small initiative that started in a small village called Anand (means Happiness), to collect the surplus milk collected by farmers from the 1-2 animals in their keep. This went on to feed a whole nation's requirement of milk and milk products.
At present NDDB covers over 300 districts, approximately 110,000 villages, and hold on...some 15 million farmers!
The attached picture shows milk collection at a village society a routine every evening at 6:00 PM.

This one for case studies across social, agri, management, NGO and well milk of course!