Which grain does NOT contribute to the composition of Whistling Andy Harvest Select?

Whistling Andy Harvest Select is known for its specific grain composition that influences its flavor profile. The correct choice is oats, as they are not one of the grains traditionally utilized in the mash bill for this particular spirit.

The inclusion of barley, rye, and wheat in many whiskey or spirit formulations contributes distinctive flavors and characteristics. Barley often provides malty notes, rye can introduce spiciness, and wheat might offer sweetness and a smooth mouthfeel. In contrast, oats are typically not included in this type of spirit because they do not contribute the necessary fermentable sugars or flavors that align with the desired profile of Whistling Andy Harvest Select.

Thus, the absence of oats in the grain composition solidifies why they are not a contributing factor to this specific product.