The key ingredient is suet, which is pure refined animal or vegetable fat and one of the most concentrated and easily metabolised energy foods for wild birds. The only things added to the suet are cereals and seeds, Johnston & Jeff pride themselves on quality and never use bulking ingredients. Fat Balls are a great choice for year-round feeding and can even cope with hard frost. Use a selection of seed blends, peanuts and suets to attract a variety of species