California Code, Penal Code - PEN § 597b

(a) Except as provided in subdivisions (b) and (c), any person who, for amusement or gain, causes any bull, bear, or other animal, not including any dog, to fight with like kind of animal or creature, or causes any animal, including any dog, to fight with a different kind of animal or creature, or with any human being, or who, for amusement or gain, worries or injures any bull, bear, dog, or other animal, or causes any bull, bear, or other animal, not including any dog, to worry or injure each other, or any person who permits the same to be done on any premises under his or her charge or control, or any person who aids or abets the fighting or worrying of an animal or creature, is guilty of a misdemeanor punishable by imprisonment in a county jail for a period not to exceed one year, by a fine not to exceed ten thousand dollars ($10,000), or by both that imprisonment and fine.

(b) Any person who, for amusement or gain, causes any cock to fight with another cock or with a different kind of animal or creature or with any human being; or who, for amusement or gain, worries or injures any cock, or causes any cock to worry or injure another animal; and any person who permits the same to be done on any premises under his or her charge or control, and any person who aids or abets the fighting or worrying of any cock is guilty of a misdemeanor punishable by imprisonment in a county jail for a period not to exceed one year, or by a fine not to exceed ten thousand dollars ($10,000), or by both that imprisonment and fine.

(c) A second or subsequent conviction of this section is a misdemeanor or a felony punishable by imprisonment in a county jail for a period not to exceed one year or the state prison for 16 months, two, or three years, by a fine not to exceed twenty-five thousand dollars ($25,000), or by both that imprisonment and fine, except in unusual circumstances in which the interests of justice would be better served by the imposition of a lesser sentence.

(d) For the purposes of this section, aiding and abetting a violation of this section shall consist of something more than merely being present or a spectator at a place where a violation is occurring.