Intensive breeding, ungrazed, develops in cattle. This method has become the standard across the world as with dairy cows. In the United States, farms can concentrate more 30 000 beasts far from meadows in confined spaces. The result : cheap, mass-produced milk. But the consequences are sometimes disastrous between animal abuse, air or groundwater pollution. Investigation into these “factory farms” in the United States and France. The director, Frédérique Mergey, followed for the occasion the fight between the promoters of the first initiative of this kind, the farm project 1000 cows, developed near Abbeville in the Somme, and his opponents.