8in1 Ecotrition essential blend guinea pig food is a super premium seed blend based on field research. With the optimal variety of fruits, nuts, seeds and vegetables plus Ester. Since Guinea Pigs cannot produce Vitamin C they forage for food that provide high levels of the vitamin. Ester C is the most easily digestible, readily available form of Vitamin C to help ensure optimum balanced nutrition. It has 2-pounds weight and includes 6 pieces per pack.