Birdola seed cakes are designed for the habits of wild birds. Our specially selected seed blends are help together with a protein binder so birds can peck their favorite seed and leave the rest of the cake intact. Best of all, Birdola is good for birds. It has a gourmet mix of premium seeds, with no "junk", or waste seeds that birds simply kick out of a bulk mix (this includes oats, barley and wheatgrass). Our products provide simple solutions for both bird-watchers and their feathered friends. The Birdola No-Waste Stacker contains no hulls or shells. This stacker is 100% edible meaning the entire cake is consumed. No-Waste Stacker contains peanut hearts, sunflower chips, peanuts hulled millet and cracked corn. This product is easy to use with the Birdola Stacker Stand feeder and can be used to attract a wider variety of birds since you can include up to three different blends.