Cal. Food and Agricultural Code - FAC § 15041. Section 15041.
A commercial feed is adulterated in the following cases:
(a)
It bears or contains any poisonous, deleterious, or nonnutritive substance in amounts which are specified as being unsafe by the director by regulations.
(b)
If any valuable constituent has been in whole or in part omitted or abstracted therefrom or any less valuable substance substituted therefor.
(c)
Its composition differs from, or quality falls below, that which it is purported or is represented to possess by its labeling.
(d)
It contains a drug or drugs or other additive and the methods used in or the facilities or controls used for its manufacture, processing, or packaging do not conform to current good manufacturing practice regulations adopted by the director to assure that the drug or drugs or other additive meets the requirement of this chapter as to safety and has the identity and strength and meets the quality and purity characteristics which it purports or is represented to possess.