Chocolate milk and any other flavoured milk is made from the same high quality milk as regular white milk, and no, it doesn’t come from brown cows. Chocolate milk is made from fresh white milk and has cocoa and sugar added to it.
Fresh milk is perishable. It is quickly processed, shipped to stores and sold. Milk that has passed its best before date is not recycled into other products. No milk or dairy products are produced with any contaminated or old milk.