Compound feedingstuffs are mixtures of feed materials, which may contain additives for use as animal feed in the form of complete or complementary feedingstuffs. Council Directive 79/373/EEC sets out the current rules on the marketing and labelling of compound feedingstuffs. Feedingstuffs may only be put on the market if they are "sound, genuine and of merchantable quality". They must not represent any danger to human or animal health or to the environment.