Brown rice and sweet potatoes are both sources of complex carbohydrates providing a good source of energy for dogs fighting cancer. Unlike white rice and many other grains that can increase blood sugar, brown rice helps minimize blood sugar spikes and has been shown to have antioxidant and anti-inflammatory properties among other health benefits. Digestible complex carbohydrates make up only 10% of the total calories of the Canine Biologics Integrated Nutrition System.