These balls have been specifically developed to provide birds with extra energy. Made from high energy nutritious fat, seeds and oils. Superb value 'no nets' fat balls in a handy resealable tub. Suitable for feeding from: Feeders Tables Ground Fat Balls are important all year round for wild birds particularly; - During the cooler winter months when birds need to maintain their fat levels. - The breeding season when birds are busy building nests and raising young. - The moulting season and pre-migration.