Chronic Wasting Disease Laws in California Every Hunter and Landowner Must Know

Chronic wasting disease arrived in California in a way that changed the state’s wildlife management landscape overnight. CWD was detected for the first time in California’s deer, with the California Department of Fish and Wildlife (CDFW) receiving confirmation from samples collected from two deer — one in Madera County near Yosemite Lakes and the other in Inyo County, near Bishop. What had long been a prevention story became a response story, and the regulations that followed are now binding on every hunter, landowner, and deer farmer in the state.

Whether you hold a deer tag, manage land with cervids present, or simply want to understand your legal obligations, California’s CWD rules carry real teeth. Violations can result in citations, permit revocations, and criminal penalties. This guide walks you through each layer of the law — what it covers, where it applies, and what you must do to stay compliant.

CWD Status and Affected Areas in California

The CDFW has detected Chronic Wasting Disease within the state and is working diligently to monitor and manage the presence of the disease within California’s wildlife populations. The confirmed detections in Madera and Inyo counties triggered an immediate regulatory response from the California Fish and Game Commission.

In response to recent CWD detections in California, the California Fish and Game Commission implemented new regulations that significantly impact hunters in certain areas. The Commission defined a CWD management zone as “any deer hunt zone, or county, where CWD has been detected or is within 5 miles of a CWD detection,” with mandatory CWD testing requirements applying in zones D7, X9a, X9b, and X9c following detections in Inyo and Madera Counties.

The disease itself is a fatal neurological condition. CWD is a transmissible spongiform encephalopathy (TSE) found in deer and elk, believed to be caused by a mutated protein called a prion that attaches to and transforms healthy brain proteins into disfigured mutations, leading to deterioration of the brain and ultimately the death of the animal. Because prions are environmentally persistent, the geographic boundaries of concern extend well beyond confirmed detection sites.

Surveillance methods include targeted testing of harvested animals, monitoring of roadkill, and mandatory reporting of sick or unusual-looking animals. Understanding which zone you are hunting in — and whether it carries mandatory testing obligations — is your first legal obligation before stepping into the field. You can check current detection data and zone maps through the CDFW’s CWD surveillance page or review the summary of California’s CWD-related regulations published by CDFW.

Baiting and Feeding Restrictions in California

California’s prohibition on baiting and feeding in the context of hunting and wildlife management predates the CWD detections, but the disease has given these rules renewed urgency. CA Code of Regulations, Title 14, Section 251.3, effective September 1, 1979, prohibits taking resident game birds and mammals by the aid of bait, and a subsequent amendment effective July 1, 1996 added a prohibition against feeding big game mammals.

The reason these rules matter for CWD is straightforward. Baiting deer is a common practice in many areas, but it can bring animals together that might not meet in the field, and saliva, urine, and fecal matter can easily pass CWD from one animal to another. Artificial congregation at bait sites accelerates exactly the kind of animal-to-animal contact that spreads prion disease.

Beyond traditional bait, California has also addressed cervid-derived lures. Section 257.5 prohibits taking resident game birds and mammals by the aid of bait, but the current definition of bait in this section did not originally include cervid-derived biofluid-based lures, which may attract animals through scent or hormonal cues. Regulatory updates approved by the Fish and Game Commission in 2024 addressed this gap, bringing scent-based cervid attractants within the scope of the baiting prohibition. Always check the current version of Section 257.5 before using any deer attractant product.

For landowners and wildlife managers, Section 251.3 also prohibits the feeding of big game mammals — meaning supplemental feeding programs for deer on private property are not permitted under California law. This applies year-round, not just during hunting season. If you manage land where deer are present, review your practices against California’s broader wildlife management rules to ensure full compliance.

Carcass Transportation Rules in California

California’s carcass importation rules are among the most detailed components of its CWD framework. If you hunt deer or elk out of state and plan to bring any part of the animal back into California, the law specifies exactly what you may and may not transport across the state line.

It is unlawful to import or possess any hunter-harvested deer or elk carcass or parts of any cervid carcass imported into the state, except for the following body parts: portions of meat with no part of the spinal column, brain, or head attached; hides and capes with no spinal column, brain tissue, or head attached; clean skull plates with no brain tissue present and antlers attached; antlers with no meat or tissue attached (legally harvested antlers in the velvet stage are allowed if no meat, brain, or other tissue is attached); and finished taxidermy mounts with no meat or tissue attached.

Since the suspected infective agent — the prion — is concentrated in the brain, spinal cord, and lymph glands, the most common regulation is the prohibition of the importation of whole carcasses harvested from CWD areas. California’s rules align with this national consensus but apply them broadly: the restrictions are not limited to animals harvested in CWD-positive states. They cover all out-of-state cervid imports.

Within California’s CWD management zones, best practices for in-state carcass handling are equally important. The CDFW asks that California hunters follow best practices for safe carcass handling and movement within these hunt zones: field dress and leave the internal organs and spinal column at the site the deer was taken; if self-sampling your harvest, remove the skullcap with antlers attached and leave the brain at the site of harvest; otherwise, bring the intact head to a CDFW office or sampling station for CWD testing.

If you are transporting a harvested animal through multiple states on your way back to California, check each state’s transit rules as well. You can find a broader overview of California’s rules governing animal carcasses and roadkill for additional context on how the state handles wildlife remains.

CWD Testing Requirements for Hunters in California

Mandatory CWD testing is one of the most significant changes to hit California hunters in recent years. Archery deer seasons opened throughout most of California on August 17, 2024, including in four hunt zones — D7, X9a, X9b, and X9c — where successful hunters are required to test their animals for CWD within 10 days of take. In response to the recent CWD detections in Madera and Inyo counties, the California Fish and Game Commission adopted regulations requiring mandatory CWD testing in the affected hunt zones to better understand the extent of the outbreak, inform decision-makers, and help protect California’s deer and elk herds.

Mandatory sampling applies to all deer tag holders hunting in the newly designated CWD Management Zones, including those with A16, A17, A18, D7, G3, G39, J12, X9a, X9b, or X9c deer tags. This is a broader list than the four zones originally designated, reflecting the Commission’s expanded management zone boundaries. The 2025 deer season carried forward these requirements, with CDFW continuing to emphasize hunter participation in surveillance efforts.

You have two primary options for submitting your sample:

• Self-sampling: CDFW provides a how-to video, printable guide, and data card for CWD sampling and self-sample submissions at wildlife.ca.gov/CWD/Collect-Submit-Samples.
• Station submission: Bring the intact head to a CDFW office, sampling station, or participating meat processor or taxidermist for testing.

Hunters in the mandatory sampling zones are also required to provide their name, GO ID, deer tag or document number, and harvest location along with their samples. Incomplete submissions can be treated as non-compliance.

To check test results for your deer, enter your document or tag number in the “Find Your CWD Testing Results” section of CDFW’s CWD Surveillance web pages. Testing takes approximately three to five weeks to be completed and results posted.

Outside mandatory zones, CDFW recommends testing any deer or elk harvested in a CWD-positive area, whether there is a mandatory test requirement or not. Voluntary testing data directly informs future zone designations and management decisions. You can find sampling station locations and dates at the CDFW’s CWD Surveillance page.

Captive Cervid and Deer Farming Rules in California

California takes one of the most restrictive approaches to captive cervids of any state in the country. If you operate or are considering operating a facility with deer, elk, or any related species, the regulatory framework is extensive and involves multiple state agencies.

The Department of Fish and Wildlife has authority over all captive cervids and issues the permits required for possession. The Department of Food and Agriculture becomes the lead over captive cervids only if a disease outbreak occurs that could impact livestock, such as tuberculosis and brucellosis.

The core restrictions on captive cervids are as follows:

• Restricted species classification: All cervids are considered “detrimental species” under California’s restricted species laws (CA Code of Regulations, Title 14, Section 671), and permitting requirements are strictly regulated by CDFW following prior written approval from the Wildlife Investigations Lab.
• Native deer farms prohibited: Native deer farms are prohibited. Fallow deer are strictly regulated under a fallow deer farming permit.
• Importation testing requirements: All cervids permitted for importation require specific pre-entry disease testing and/or herd testing and certification. No cervids are allowed for import that originate from CWD-positive states, or have a history of contact with captive elk, or any other potential risk.

Live cervid importation requires prior authorization, testing, and permitting from CDFW as defined in regulation. It is unlawful to import cervids from a CWD-positive state unless otherwise authorized by CDFW. The Department has authority to deny or revoke live cervid importation permits based on specific criteria, including potential exposure.

Section 676 outlines requirements for possession, use, movement, and importation of live fallow deer — a cervid — including permitting and disease testing requirements for fallow deer farming. The importation permit incorporated in this section was last updated in 1997 and covers only the species Dama dama (fallow deer). Regulatory updates approved by the Commission in 2024 have addressed gaps in the original framework, including expanding coverage to the broader Cervidae family.

If you keep or are considering keeping any livestock or farm animals in California alongside cervids, review California’s livestock disease reporting requirements and goat ownership laws as related frameworks that may intersect with your operations. Similarly, backyard pig laws in California offer context on how the state regulates other potentially disease-susceptible farm animals.

Reporting Sick or Suspected Deer in California

Reporting is not optional in California — it is a legal obligation built into the state’s CWD surveillance framework. CWD is listed by the California Department of Food and Agriculture as a reportable disease. This means that if you observe, handle, or harvest an animal you suspect may be infected, you have a legal duty to report it.

Signs of CWD in deer and elk can include extreme weight loss, stumbling or loss of coordination, drooling, drooping ears, lack of fear of humans, and aimless wandering. Animals displaying these symptoms should never be harvested for consumption and must be reported immediately.

How to report a sick or suspected deer in California:

1. Contact CDFW directly: Call your regional CDFW office or use the online wildlife incident reporting system at wildlife.ca.gov.
2. Do not handle the animal: Avoid contact with brain, spinal cord, eyes, spleen, and lymph nodes. If contact occurs, wash hands and equipment thoroughly.
3. Document the location: Note the GPS coordinates or a precise description of where the animal was observed. This information is critical for zone mapping.
4. Do not move the carcass: Leave the animal in place unless instructed otherwise by CDFW. Moving a potentially infected carcass can spread prions to new areas.

Surveillance methods include targeted testing of harvested animals, monitoring of roadkill, and mandatory reporting of sick or unusual-looking animals. Roadkill deer are also part of the surveillance network — if you encounter a freshly killed deer on a roadway, CDFW may request a sample. For more on how California handles roadkill more broadly, see California’s roadkill laws.

If you are a landowner or farmer and observe sick animals on your property, the reporting obligation connects directly to California’s broader livestock disease reporting framework. Early detection is the state’s primary tool for containing the spread of CWD before it reaches new deer populations.

Penalties for CWD Violations in California

California treats CWD violations seriously, and the enforcement posture has tightened considerably since in-state detections were confirmed. Penalties vary depending on the nature of the violation, but they span civil citations, criminal misdemeanor charges, permit revocations, and in some cases felony-level wildlife offenses.

Citations are being issued to hunters not compliant with carcass importation regulations, and meat processors are not allowed to accept out-of-state whole cervid carcasses not compliant with the regulation. This means the enforcement chain extends beyond individual hunters to commercial processors — a business operating a meat processing facility can face regulatory action for accepting non-compliant carcasses.

Under California’s Fish and Game Code, most wildlife violations are classified as misdemeanors carrying fines and potential jail time. Repeat violations or violations involving commercial-scale activity — such as unlawful operation of a captive cervid facility — can be elevated to felony charges depending on the circumstances. CDFW wardens have broad authority to inspect, cite, and seize animals and equipment in connection with CWD enforcement.

Understanding the full scope of California’s animal-related laws can help you stay compliant across multiple areas. For related context, review California’s animal cruelty laws, which can intersect with wildlife handling obligations, and California’s broader pet and animal ownership laws for the regulatory landscape that governs keeping animals in the state. If you keep backyard animals, backyard chicken laws and beekeeping laws in California offer useful parallel examples of how the state regulates animal husbandry at the local level.

California’s CWD regulations are not static. The emphasis on CWD surveillance represents a significant shift in wildlife management priorities, requiring hunters to play an active role in disease monitoring efforts. Staying current with CDFW updates, checking your hunt zone’s designation before each season, and following all testing, carcass handling, and reporting requirements are the clearest path to compliance — and the most effective way to help protect California’s deer and elk herds for future generations.