Translations:Adventist Youth Honors Answer Book/Outdoor Industries/Dairying/20/en
From Pathfinder Wiki
Cows make milk with their mammory tissues just like all mammals (including humans). To start a cow milking first she must get pregnant (around age 2) and give birth. The farmer then continues to milk the cow and the continued demand for milk causes the cow to continue to produce milk. It is not necessary for the cow to get pregnant or give birth again.
