Livestock Disease Reporting in Wisconsin: Rules, Deadlines, and Penalties
August 24, 2026
Wisconsin is home to one of the most active agricultural economies in the nation, and protecting its livestock from disease is a shared legal responsibility — not just a best practice. If you raise cattle, swine, poultry, sheep, goats, or any other regulated species in the state, you are bound by specific rules that govern when and how you must report a suspected disease.
Failing to understand those rules can lead to delayed outbreak responses, economic losses across entire regions, and serious legal consequences for you and your operation. This guide walks you through every aspect of livestock disease reporting in Wisconsin, from the diseases on the official list to what happens after you make the call.
Reportable Livestock Diseases in Wisconsin
Wisconsin’s reportable animal disease framework is governed by the Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP) under Wis. Admin. Code ch. ATCP 10. The diseases you are required to report are organized into two tiers based on urgency, each carrying its own deadline.
Reportable diseases fall into several categories, including foreign animal diseases — those not previously found in the United States — as well as diseases currently targeted for eradication, such as pseudorabies and bovine tuberculosis. The full list is published in ATCP 10 Appendix A and Appendix B.
Appendix A contains the highest-priority diseases, which must be reported within one business day. Appendix B covers diseases that require reporting within ten days. Both lists are updated periodically by DATCP, and the state veterinarian has authority to add new diseases on an emergency basis when a novel threat emerges.
| Disease Category | Examples | Reporting Tier |
|---|---|---|
| Foreign Animal Diseases | Foot-and-Mouth Disease, Classical Swine Fever, Highly Pathogenic Avian Influenza | Appendix A (1-day) |
| Eradication Program Diseases | Bovine Tuberculosis, Pseudorabies, Brucellosis | Appendix A or B depending on species/test |
| Monitored/Surveillance Diseases | Johne’s Disease, Equine Infectious Anemia, Chronic Wasting Disease | Appendix B (10-day) |
| Vesicular Conditions | Vesicular Stomatitis, any foot-and-mouth-type lesions | Appendix A — immediate phone contact required |
Under ATCP 10.03(7), if the state veterinarian determines that a new disease is reportable because it presents a threat to animals or humans residing in Wisconsin, he or she may issue an order to make the disease reportable within one or ten days until it is formally published under ATCP 10 Appendix A or B. This provision ensures the system can respond quickly to emerging threats like new strains of avian influenza.
For diseases affecting bovine animals specifically, Wisconsin’s tuberculosis and brucellosis eradication programs carry some of the most detailed testing and reporting obligations in the state code. Similarly, if you raise poultry, Newcastle disease is among the conditions that can trigger immediate reporting obligations under the foreign animal disease category.
Who Is Required to Report a Livestock Disease in Wisconsin
One of the most important points to understand about Wisconsin’s framework is that the obligation to report is broad. It is not limited to veterinarians.
Anyone — including veterinarians, producers, and animal owners — who suspects a reportable animal disease is required to report it to a federal or state animal health official. This means that if you observe signs consistent with a serious disease on your farm and have not yet called a vet, you are still legally obligated to make a report.
The code specifically covers any person who “diagnoses or obtains credible diagnostic evidence” of a listed disease. In practice, this includes:
- Licensed and accredited veterinarians
- Livestock producers and farm operators
- Animal owners, including hobby farmers and small-scale operations
- Veterinary technicians certified under Wisconsin’s program
- Diagnostic laboratory personnel who receive and process test samples
- DHIA technicians who conduct herd health testing
Under federal rules, an accredited veterinarian shall immediately report to both the Veterinary Official and the State Animal Health Official all diagnosed or suspected cases of a communicable animal disease for which APHIS has a control or eradication program, and all diagnosed or suspected cases of any animal disease not known to exist in the United States.
Wisconsin also requires that any location keeping livestock be registered with DATCP. Premises registration provides DATCP with information about what kind of livestock you have, where they are located, and how to contact you in case of an animal disease outbreak. This registration system is what allows the state to rapidly notify producers in the event of a confirmed outbreak near their operation. If you raise birds or other specialty livestock, your premises registration is equally important for ensuring you are contacted during a disease response.
Signs and Symptoms That Trigger a Report in Wisconsin
You do not need a confirmed laboratory diagnosis to be required to file a report. The legal standard under ATCP 10.03 is “credible diagnostic evidence,” which means observable clinical signs can be enough to trigger your obligation.
The following categories of signs should prompt you to contact DATCP or a federal animal health official without delay:
- Vesicular lesions: Blisters, sores, or erosions on the mouth, tongue, feet, teats, or snout of cattle, swine, sheep, or goats — these are the hallmark signs of foot-and-mouth disease and similar foreign animal diseases
- Sudden unexplained death: Multiple animals dying in a short period without a clear cause, especially if accompanied by neurological signs
- Severe respiratory distress: Rapid spread of respiratory illness through a flock or herd, particularly in poultry where highly pathogenic avian influenza must be ruled out
- Neurological signs: Tremors, circling, incoordination, or unusual behavior in cattle, swine, or equines that may indicate encephalitic diseases
- Reproductive failure: Sudden increases in abortions, stillbirths, or weak newborns across multiple animals, which can indicate brucellosis or other reportable conditions
- Severe diarrhea and wasting: Chronic, progressive weight loss combined with profuse diarrhea in adult cattle, which can suggest Johne’s disease
- Unusual swelling or hemorrhaging: Swelling of the head, neck, or limbs, or unexplained hemorrhaging in body tissues
You should also report any suspicious clinical or necropsy findings accompanied by a history of people or animals that have recently returned from a foreign country, and any disease of unknown etiology causing high mortality or morbidity.
If you live or work with animals or animal products like milk, eggs, or meat, you should know that even healthy animals can pass diseases to each other and to the people around them. Cattle, goats, sheep, pigs, chickens, and turkeys may spread harmful viruses and bacteria — like avian influenza, Salmonella, Cryptosporidium, Campylobacter, E. coli, and Giardia — through their body fluids, waste, and uncooked products. Some of these are zoonotic diseases that can transfer to humans, making prompt reporting a matter of public health as well as animal health.
How to Report a Livestock Disease in Wisconsin
Wisconsin gives you several options for making a disease report, but the method you use and the speed with which you act must match the tier of disease you are dealing with.
For Appendix A diseases (highest priority):
If you are reporting vesicular conditions of any type — such as foot-and-mouth disease — or other Appendix A diseases, do not use the online form. Immediately contact a DATCP district veterinarian. The protocol from DATCP is as follows:
- Call your assigned DATCP district veterinarian directly.
- If there is no answer, leave a message and a call-back number. If you do not receive a call back within two hours, call your district veterinarian again.
- If there is still no answer, call any other district veterinarian until you have succeeded in contacting someone.
- If you receive no response after following the above protocol, contact the Wisconsin Duty Office at 1-800-940-0003 and select option 2.
For Appendix B diseases and other reportable conditions:
To report an animal disease that is not included on the emergency list, use the Reportable Animal Disease online form available through DATCP.
A person may make a report under ATCP 10.03 by telephone, by email, by fax, or by any other effective means of communication that ensures the report will reach the department within the applicable time limit. The reported information shall include official individual identification (if required), the species, age, sex, and breed of the animal possibly infected with the disease, the address of the farm, and the premises code, if any.
If the report is not initially in writing, the person shall confirm the report in writing by mail, email, or fax within 10 days.
When you contact DATCP, have the following information ready:
- Your DATCP premises registration number
- Species affected and approximate number of sick or dead animals
- Age, sex, and breed of affected animals
- Clinical signs observed and when they first appeared
- Any recent animal movements onto or off your premises
- Contact information for your herd veterinarian
If you are also transporting animals and need to understand movement compliance during a potential outbreak, review the livestock trailer requirements in Wisconsin to ensure you are not inadvertently spreading disease through non-compliant transport.
For context on how neighboring states handle this process, see the reporting frameworks for livestock disease reporting in Illinois and livestock disease reporting in Michigan.
Reporting Deadlines and Timeframes in Wisconsin
Wisconsin’s reporting deadlines are set by ATCP 10.03 and are tied directly to which appendix a disease appears in. There is no grace period, and the clock starts the moment you make a diagnosis or obtain credible evidence — not when you receive a formal lab result.
| Appendix | Deadline | Disease Examples | Follow-Up Requirement |
|---|---|---|---|
| Appendix A | Within 1 day (24 hours) | Foot-and-Mouth Disease, Highly Pathogenic Avian Influenza, Classical Swine Fever, Vesicular conditions | Written confirmation within 10 days if initial report was verbal |
| Appendix B | Within 10 days | Johne’s Disease, Equine Infectious Anemia, Bovine Leukosis | Written confirmation within 10 days if initial report was verbal |
| Emerging/New Disease (State Vet Order) | Within 1 or 10 days per order | Novel pathogens as designated by the state veterinarian | Per order requirements |
Under ATCP 10.03(1), a person who diagnoses or obtains credible diagnostic evidence of any disease identified in ATCP 10 Appendix A shall report that diagnosis or evidence to the department within one day after making the diagnosis or obtaining the evidence. Under ATCP 10.03(2), a person who diagnoses or obtains credible diagnostic evidence of any disease identified in ATCP 10 Appendix B shall report that diagnosis or evidence to the department within 10 days.
There are two important exceptions to the reporting obligation. If the department, the Wisconsin Veterinary Diagnostic Laboratory, or the Wisconsin Department of Health Services makes a diagnosis or obtains evidence under ATCP 10.03(1) or (2), no other person is required to report the diagnosis or evidence. Additionally, a person is not required to make a report if another person reports the same information under ATCP 10.03(1) or (2). These provisions prevent duplicate reporting when a lab or agency has already notified DATCP.
Tuberculosis cases carry additional timelines once a reactor is identified. Within 15 days after the department or the federal bureau classifies an animal as a tuberculosis reactor, the department shall quarantine the animal and require additional testing or measures to control or eradicate the disease.
What Happens After You Report in Wisconsin
Filing a report sets a defined response process in motion. DATCP does not simply log your report and move on — the agency is obligated to investigate and take protective action.
When a veterinarian reports a suspected case, a state or federal veterinarian will investigate and, if necessary, submit samples to a veterinary diagnostic lab for testing. For Appendix A diseases, this investigation begins within hours of your report, not days.
The typical post-report sequence in Wisconsin looks like this:
- Initial contact and triage: A DATCP district veterinarian or federal APHIS veterinarian contacts you to gather preliminary information and assess risk level.
- On-farm investigation: A state or federal veterinarian visits your premises to conduct a clinical examination, review records, and collect samples if warranted.
- Laboratory testing: Samples are submitted to the Wisconsin Veterinary Diagnostic Laboratory (WVDL) or a USDA-approved federal lab for confirmatory testing.
- Quarantine determination: If the investigation reveals a credible threat, DATCP may impose a quarantine on your premises under ATCP 10 to restrict animal movement.
- Trace-back and trace-forward: DATCP uses your premises registration number and animal ID records to identify animals that may have been exposed or moved to other locations before the disease was detected.
- Notification of neighboring premises: Through the premises registration database, DATCP’s Division of Animal Health has a vital tool to help prevent and control the spread of disease. What used to take weeks of going through paper documentation and driving door-to-door to identify locations and notify owners can now be done in minutes.
Under ATCP 10.04(2), an owner or custodian of animals shall make those animals available to the department, at the department’s request, for any disease testing that the department is authorized to perform on those animals. This means you cannot refuse access to your herd for official disease testing once a report has been filed and an investigation is underway.
If your animals are confirmed positive for a disease subject to an eradication program, DATCP may pursue depopulation, indemnification, or mandatory treatment depending on the disease and the applicable program rules. Producers who have reported disease in other states have gone through similar processes — see how livestock disease reporting in Florida and livestock disease reporting in Colorado handle post-report responses for comparison.
Penalties for Failing to Report in Wisconsin
Wisconsin takes non-compliance with its animal disease reporting requirements seriously. The consequences for failing to report extend beyond civil fines and can affect your ability to operate as a livestock producer.
Violations of Wis. Admin. Code ch. ATCP 10 may, among other things, subject the violator to penalties and remedies provided in Wis. Stat. s. 95.99. That statute provides the legal foundation for DATCP’s enforcement authority and outlines the range of consequences available to the state.
Under Wis. Stat. s. 95.99, penalties for violations of animal disease control laws can include:
- Civil forfeitures: Fines for each violation, which can be assessed per incident or per day that a violation continues
- Criminal penalties: Willful or knowing violations of animal disease control statutes can be prosecuted as misdemeanors or, in more serious cases, as felonies under Wisconsin law
- Mandatory testing at your expense: If an animal is moved or imported without being tested according to ATCP 10, or may be exposed to a disease identified in ATCP 10 Appendix A or Appendix B, the department may order the testing performed, or may order that an authorized employee or agent of the department perform the testing, at the owner’s expense.
- No relief from other penalties: Testing completed under a department order does not relieve any person from other penalties or remedies that may apply because of the illegal import or movement.
- Quarantine and movement restrictions: DATCP can impose quarantine on your entire premises, halting all animal sales and movements until the situation is resolved
- License suspension or revocation: For licensed animal dealers, markets, or truckers, violations can result in suspension or revocation of your DATCP operating license
Beyond the formal legal penalties, failing to report can expose you to civil liability from neighboring producers whose herds are affected by a disease you failed to disclose. Wisconsin’s livestock economy is deeply interconnected, and an unreported outbreak can spread rapidly through shared markets, truckers, and auction facilities.
Some diseases also pose a threat to human health, making rapid response essential to public safety. Having a system with proper trace-back and trace-forward capabilities provides for a timely response to minimize the economic impact in the event of an outbreak. Producers who delay or avoid reporting undermine this system for every livestock operation in the state.
To understand how Wisconsin’s penalty framework compares to other states, you can review livestock disease reporting in California, which operates under a similarly stringent enforcement structure.