Suet is raw beef or mutton fat, especially the hard fat found around the loins and kidneys and is considered a saturated fat. The type sold in supermarkets is dehydrated suet. Wild Bird Chow Cardinal Cake and Suet Snack are a superior cake/snack blend for wild birds. Wild Bird Chow Cardinal Cake and Suet Snack is an excellent source for year-round energy for winter cold. It is also excellent food choice during summer parenting and spring and fall migration periods. Wild Bird Chow Cardinal Cake and Suet Snack are fortified with calcium for optimum nutrition and is packed with the seeds and nuts wild birds love. Woodpeckers, goldfinches, juncos, cardinals, thrushes, jays, kinglets, bluebirds, wrens, and starlings are all known to favor suet-based bird feeders.