Cal. Food & Agric. Code § 32741

If the director determines that any female dairy animal, including any goat, is carrying pesticide residues in its body or has been fed any feed which contains an amount of pesticide residues which will cause the milk produced from the animal to be adulterated with pesticide residues, he may order the animal to be held on the premises where it is found until he has determined that milk produced by the animal is not adulterated with pesticide residues.