Rendered Beef Suet, Corn, White Millet, Oats, Sunflower Meal. Our Wild Bird Suet Treats will become soft and pliable at 100° F if exposed to extreme heat. They will return to normal hardness at room temperature. Refrigerate for easy removal. Our unique high quality process allows High Energy Bird Suet to be fed year round. Just remove the wrap and insert cake into feeder.