Black rice is a type of husked rice we use for cooking dog food. It is a source of fiber and a bulking agent. The alternative would be other whole grains, such as oatmeal, or potatoes. We cook between 1.5kg and 2.0kg of black rice every day, including Sundays. The main problem with black rice is that it is often unavailable at the supermarket, so we buy as much as we can while they have it in stock.