The California Health and Safety Code makes it a misdemeanor, with a significant fine, to fail to quarantine or produce an animal that might have rabies, or has bitten, or to fail to give information about such an animal:
121705. Any person who willfully conceals information about the location or ownership of an animal subject to rabies, that has bitten or otherwise exposed a person to rabies, with the intent to prevent the quarantine or isolation of that animal by the local health officer is guilty of a misdemeanor. Any person who violates this section is guilty of a misdemeanor.
121710. Any person who, after notice, violates any order of a local health officer concerning the isolation or quarantine of an animal of a species subject to rabies, that has bitten or otherwise exposed a person to rabies or who, after that order, fails to produce the animal upon demand of the local health officer, is guilty of a misdemeanor, punishable by imprisonment in the county jail for a period not to exceed one year, or by fine of not less than one hundred dollars ($100), nor more than one thousand dollars ($1,000) per day of violation, or by both fine and imprisonment.