Crumps' Naturals Traditional Liver Fillets are made from Beef Liver that is sliced thin and slow baked just long enough to provide a crunchy texture and yet still break apart easily without crumbling. They contain no artificial colours, additives or preservatives and are ideal for training or simply as a treat. Crumps' Naturals Traditional Liver Fillets are a high quality, single-source protein treat made in Canada.