Feed your adult rat a low-fat diet and prevent life-threatening obesity with Oxbow Essentials Regal Rat Adult Rat Food. Adult rats four months and older have different nutritional needs than when they were in growing stages. Because they are less active, they don't require the same levels of certain nutrients and fat. Foods high in fat can result in obesity and other health issues. Oxbow Essentials Regal Rat Adult Rat Food is designed meet your pet's adult nutritional needs and increase their longevity. It contains brown rice, a low-calorie energy source, oats and wheat for fiber and soy and fish meal, protein sources with healthy fats. Feed an unlimited supply to adults that have healthy weights and combine with grass hay to encourage foraging.