Jarre Creek Ranch Chocolate Milk Stout

Draught, Falling Rock. Body is dark brown to black. Aroma is moderately malty (cookie, chocolate, roasted grain), with a strong note of sour milk. Flavor is moderately sweet, moderately acidic. Finish is lightly sweet, moderately acidic, lightly bitter. Light to medium body, watery/creamy texture, soft carbonation. Scary bad...if they put real chocolate milk in this, which is the only way I can imagine the aroma being as it is, then surely it was spoiled? Really disturbing aroma and sourness.