A livestock or poultry product is misbranded if it is not subject to the provisions of Section 18784, unless its label bears the common or usual name of the food, if any, and in case it consists of two or more ingredients, the common or usual name of each such ingredient. The director may, however, permit spices, flavorings, and colorings to be designated as spices, flavorings, and colorings without naming each, and to the extent that compliance with the requirements of Section 18784 are impracticable, or results in deception or unfair competition, by granting exemptions that conform to the purposes of this chapter.