It is unlawful to use or sell a commercial feed containing any poisonous or deleterious substance or any substance which when fed in accordance with label directions or when used in accordance with usual feeding practices may impair the health of the animal being fed or result in an illegal or harmful residue or constituent in or on human food.
Cal. Code Regs. Tit. 3, § 2677
Note: Authority cited: Sections 407 and 14902, Food and Agricultural Code. Reference: Sections 14903, 15011 and 15041(a), Food and Agricultural Code.