Soaking improves digestibility. Cats and dogs have a strong but short digestive tract designed to quickly break down and absorb foods. Grains and vegetables require more complex digestion than meats, fresh fruits, and other foods, so having them soak in water at least 15 minutes for the SOJOS ORIGINAL and at least 1 hour for SOJOS GRAIN-FREE and SOJOS COMPLETE is critical to the success of the Sojos diet. Soaking overnight in the fridge is ideal.