Birdola Multi-Bird Stacker CakeBirdolas Multi Bird Stacker Cakes feature a lovely, delicious blend of premium seeds and nuts, pressed together and stacked to help attract the widest variety of species! The stacker is built on a wide perch to make feeding easy. Gourmet blend of seeds and nuts Varied mix attracts the widest variety of wild bird species Features perch for easy feeding Multi Bird Stackers have black oil sunflower, white proso millet, peanut hearts, safflower and