Our Grrowlers all natural spent grain dog treats are baked using recycled nutrient-packed spent grains from craft beer breweries, making our dog treats some of the most healthy and best dog treats available for pets. Customers love that they're all-natural, human-grade, and sustainable, too. To date we've reclaimed 74 tons of spent grain! These grains have great benefits when used instead of traditional flours. Spent grains can decrease the calorie count by 7%, increase protein content by 50% and double fiber content. And our proprietary process makes the treats smooth and easily digestible for your pet, enabling your pet to absorb the maximum amount of nutrients possible. Chicken Liver Ingredients: brewers wet grains, [barley, wheat, rye, and oat flakes] chicken liver, eggs, oat flour, ascorbic acid (vitamin C) and mixed tocopherol (vitamin E) as natural preservatives.