EIA and Coggins Test Requirements in New Hampshire: What Horse Owners Need to Know
August 6, 2026
If you own, transport, or compete with horses in New Hampshire, the Coggins test is one regulation you cannot afford to overlook. A Coggins test is a blood test used to identify the presence of antibodies for equine infectious anemia, a potentially fatal disease with no current treatment available. New Hampshire enforces some of the stricter testing timelines in the Northeast, and understanding exactly what is required — and when — protects both your animals and your legal standing.
This guide walks you through every aspect of EIA and Coggins test requirements in New Hampshire: which animals must be tested, when testing applies, how the process works, what happens after a positive result, and the consequences of non-compliance.
Pro Tip: Always keep a copy of your horse’s current Coggins certificate in your trailer or vehicle whenever you travel. New Hampshire officials and event organizers may request it at any time.
What Is Equine Infectious Anemia (EIA) and Why It Is Regulated in New Hampshire
Equine infectious anemia is a bloodborne viral disease that can affect all equids. This virus is of great concern for the horse industry and there is currently no treatment or vaccine for it. Because no cure exists, state and federal authorities rely entirely on testing and containment to prevent outbreaks.
Most often, horses with EIA are asymptomatic carriers — showing no signs or symptoms — which is one of the reasons testing is so important. EIA is most often transmitted by biting flies; tabanids (horse and deer flies) are considered the most significant transmitters. Other modes of transmission include the use of contaminated equipment, such as used needles and syringes; mare-to-foal transmission in utero; and through natural breeding of mares and stallions.
While certain equines may carry the virus without displaying any outward signs, others may exhibit pronounced symptoms of the illness, such as irregular heartbeats, edema in the legs and abdomen, lethargy, anemia, elevated body temperature, and, in severe cases, sudden death. New Hampshire regulates EIA testing through the New Hampshire Department of Agriculture, Markets and Food (DAMF), which sets mandatory testing intervals, approves laboratories, and oversees positive-case response protocols.
Despite testing and measures to eradicate the equine infectious anemia virus (EIAV), more than 500 new cases are identified each year in the U.S. New Hampshire’s stricter 6-month testing window reflects the state’s commitment to keeping that number as low as possible within its borders. You can also review wildlife disease dynamics in New Hampshire to better understand the state’s broader approach to animal health regulation.
Which Animals Require a Coggins Test in New Hampshire
The Coggins test is a diagnostic tool used to detect Equine Infectious Anemia, a viral disease that affects horses, mules, and donkeys. In New Hampshire, the testing requirement applies to all equids — meaning horses, mules, donkeys, and ponies are all subject to the same rules.
Requiring a negative Coggins test for any and all horse, mule, or donkey that are on the property or entering your property is an excellent control means to maintain an EIA-free stable. New Hampshire’s DAMF applies this principle broadly, requiring documentation across a wide range of situations including events, sales, boarding, and interstate movement.
- Horses, ponies, mules, and donkeys entering equine events or exhibitions
- Equids changing ownership through sale or transfer
- Animals entering boarding facilities or training stables
- Any equid moving into New Hampshire from another state
- Horses participating in organized trail rides and competitions
Nursing foals accompanying an EIA-negative dam may be exempt in some circumstances, but you should confirm the current status of this exemption directly with the NH DAMF at (603) 271-2404 before traveling with a foal, as exemption conditions vary by event type.
When a Coggins Test Is Required in New Hampshire
New Hampshire’s testing timeline is one of the most important distinctions to understand before you plan any equine activity in the state. New Hampshire requires proof of a negative Coggins test within the last 6 months, whereas many other states only ask for one within the last 12 months. This shorter validity window means you need to test your horse more frequently than you might be accustomed to if you are coming from another state.
Understanding the specific requirements for Coggins testing is essential for horse owners, especially when traveling across state lines. Each state in the US may have its own regulations regarding the frequency of testing, validity period of Coggins certificates, and documentation requirements. In New Hampshire, that validity period is set at 6 months regardless of whether the horse is a resident or arriving from out of state.
| Activity | Coggins Required? | NH Validity Window |
|---|---|---|
| Horse shows and exhibitions | Yes | Within 6 months |
| Sale or change of ownership | Yes | Within 6 months |
| Interstate entry into NH | Yes | Within 6 months |
| Boarding facility entry | Yes (facility-dependent) | Within 6 months |
| Organized trail rides | Yes | Within 6 months |
| Private property (no public contact) | Not mandated | N/A |
Anytime you plan to travel with your horse, make sure you explore documentation requirements for that state, facility, and event before departing. Because New Hampshire’s 6-month window is stricter than the national norm, horses with a 7- or 8-month-old certificate that would be valid in neighboring states will not meet NH requirements.
Pro Tip: Schedule your Coggins test in early spring so the certificate covers your full competition and trail season. Given New Hampshire’s 6-month window, a March draw date keeps you compliant through August.
How the Coggins Test Works and Approved Testing Methods in New Hampshire
To perform a Coggins test, a licensed veterinarian must draw blood from the horse and send it to an accredited lab for analysis. The lab will conduct a test to detect the EIA antibody — a protein that allows the body to recognize the EIA virus, which will only be present if the horse has had the EIA virus. They will then provide either a positive or a negative test result back to the veterinarian, who will share it with the horse owner.
In New Hampshire, the New Hampshire Veterinary Diagnostic Laboratory (NHVDL) tests over 8,000 horses annually for Equine Infectious Anemia. Their primary testing platform, Agar Gel Immunodiffusion (AGID), is considered the gold standard. ELISA testing is also available for same-day results.
All EIA samples must be submitted by category II accredited veterinarians and with an approved submission form. You cannot submit a sample yourself — only a federally accredited veterinarian can collect and submit the blood. Only a Category II federally accredited veterinarian, state animal health official, or federal animal health official may submit samples for EIA testing. USDA/APHIS strictly prohibits screening or preliminary testing. All EIA tests are official and need to be accompanied by an official test form.
Regarding accepted forms, only the current USDA Equine Infectious Anemia “Coggins” paper forms (VS Form 10-11 Feb 2018) can be accepted when using paper forms. These paper forms are available at the regional USDA office at (508) 363-2290 or from the state NH DAMF at (603) 271-2404. The NHVDL accepts both the GlobalVetLink and USDA VSPS digital Coggins forms.
The two primary testing methods approved for use in New Hampshire are compared below:
| Test Method | Common Name | Turnaround Time | Notes |
|---|---|---|---|
| Agar Gel Immunodiffusion (AGID) | Coggins Test | 24–48 hours | Gold standard; high specificity |
| Enzyme-Linked Immunosorbent Assay (ELISA) | ELISA | Same day / under 1 hour | Positive results must be confirmed by AGID |
The ELISA offers high sensitivity and rapid turnaround, making this test well suited for high-volume screening; however, any ELISA-positive sample must be confirmed by AGID testing in accordance with USDA and state regulations. The UNH New Hampshire Veterinary Diagnostic Laboratory is the state’s primary approved testing facility and encourages electronic reporting of lab results.
Your veterinarian will also photograph your horse as part of the process. There must be three images: one of the entire left side, entire right side, and one of the face, including muzzle and ears. Each leg must be visible all the way to the coronets. The horse should fill approximately 90% of the photo, with minimal human content in the photo. The horse should not be wearing any tack or blankets (except halter or bridle).
Interstate Movement and Import Requirements in New Hampshire
If you are planning to travel with your horse across state lines, you will need a negative Coggins test, usually within the past 6–12 months, depending on the destination state. You will also need a health certificate from your vet, often called a Certificate of Veterinary Inspection (CVI). When traveling into New Hampshire specifically, the Coggins must be within 6 months, which is stricter than the 12-month window many neighboring states use.
A typical 30-day health certificate — more properly called a Certificate of Veterinary Inspection — requires that a veterinarian examine your horse for any signs of infectious disease within 10 days of travel. The negative Coggins testing accession number must also be submitted to the state by your veterinarian for the health certificate to be valid.
Interstate transport of horses with a positive Coggins test is prohibited. Any horse entering New Hampshire from another state must arrive with both a valid CVI and a negative Coggins certificate dated within the 6-month window. Plan laboratory turnaround time into your schedule — in general, it takes 2–3 business days to get a Coggins test result back from a laboratory, so plan accordingly when arranging your appointments.
Pro Tip: If you are traveling to Canada from New Hampshire, requirements are even stricter. An international health certificate is required, and Coggins tests are only good for six months for international health certificates. This is a more complex process as it needs to be signed by the state veterinarian.
Horse owners who regularly cross state lines with their animals may also want to review New Hampshire’s hunting license requirements and fishing license requirements in New Hampshire to stay fully informed on all animal-related regulations the state enforces.
What Happens When a Horse Tests Positive in New Hampshire
EIA is a reportable animal disease in all states. This means that positive results must be reported to state and federal animal health authorities. In New Hampshire, your veterinarian is legally obligated to notify the NH DAMF and USDA APHIS as soon as a positive result is confirmed.
Following a positive Coggins test, the sample undergoes a second test to confirm that the result was not a false positive. Veterinarians must report the positive result to the state animal health authority. The veterinarian will then place the affected horse under quarantine and repeat the Coggins test to rule out a false positive. Horse owners must permanently quarantine or euthanize the horse if the second test confirms an EIA diagnosis.
Within 24 hours of a positive result, your horse will be placed in quarantine more than 200 yards from other horses until confirmation testing and classification is complete. The state vet will be informed and a case will be opened to ensure proper protocols are followed.
Because EIA has no cure or approved treatment, a positive horse is considered permanently infected. Regulations are in place to prevent disease spread and require either permanent quarantine of the infected horse — at least 200 yards away from other equids — or humane euthanasia by a veterinarian. The Equine Disease Communication Center provides updated information on EIA case reports and management protocols that align with what New Hampshire enforces.
Quarantine, Euthanasia, and Isolation Rules in New Hampshire
Once a positive EIA diagnosis is confirmed in New Hampshire, the state follows USDA APHIS guidelines, which give owners two options: permanent quarantine or humane euthanasia. Because there is no cure or vaccine, infected horses are considered infectious for life. Regulations require that positive horses be permanently quarantined, euthanized, or transferred to an approved research facility.
Permanent quarantine is not a simple stall separation. Quarantine regulations for horses with EIA are very strict. They require horses to be housed 200 yards away from other horses and kept in a barn covered in mesh to keep out biting insects. Most horse owners choose to euthanize horses with equine infectious anemia to prevent the spread of this disease and avoid long-term suffering.
The 200-yard distance is grounded in the biology of EIA transmission. Flies can’t travel very far, and the virus does not persist on their mouthparts very long, which is why an EIA-positive horse can be kept in quarantine as long as they remain 200 yards (600 feet, 183 meters) from uninfected horses.
Horses that were exposed to the EIA-positive animal before the diagnosis also face scrutiny. Exposed equines will be quarantined and tested, and will be subject to a retest 45–60 days after the removal of the EIA-positive horse. Quarantine will remain in effect until negative retest results are received.
Federal and state health agencies, as well as the American Association of Equine Practitioners, support euthanasia as the most prudent option, albeit a difficult one. Lifelong quarantine in a screened stall is another, less acceptable, alternative. EIA-positive horses will always pose an unnecessary health risk to other horses, whether or not they show signs of illness.
For horse owners interested in understanding how New Hampshire handles other animal health and wildlife regulations, see the state’s rules on rabies vaccine requirements for cats and rabies vaccine requirements for ferrets, which follow similarly strict state-level enforcement.
Penalties for Non-Compliance in New Hampshire
Failing to comply with New Hampshire’s EIA and Coggins test requirements carries real consequences. The NH DAMF has authority under state agricultural statutes to enforce equine disease control regulations, and violations can result in a range of penalties.
Within the U.S., each state drafts its own specific requirements regarding EIA and the movement of horses interstate, intrastate, and in change of ownership. New Hampshire’s enforcement framework reflects this authority. Horse owners who transport animals without a valid Coggins certificate, allow non-compliant horses to enter events, or fail to report a positive test result can face the following consequences:
- Denial of entry — Event organizers and boarding facilities are authorized to refuse any horse without a current, valid Coggins certificate.
- Mandatory removal — A horse found at an event or facility without proper documentation may be required to leave immediately at the owner’s expense.
- Civil fines — NH DAMF can issue fines for violations of equine disease control regulations under New Hampshire’s agricultural statutes.
- Criminal liability — Knowingly transporting a horse that has tested positive for EIA across state lines is a federal offense under USDA APHIS regulations.
- Quarantine orders — If a non-tested horse is suspected of exposure, the state veterinarian can issue an immediate quarantine order at the owner’s cost.
EIA is a regulated disease in all states and veterinarians are required to report suspect or positive EIA cases to state and federal animal health officials. Any veterinarian who fails to report a positive result in New Hampshire also faces professional and legal consequences under both state and federal law.
Important Note: NH DAMF can be reached at (603) 271-2404 for questions about current Coggins requirements, approved laboratories, and how to handle a positive test result. Always confirm requirements directly with the state before major events or interstate travel, as regulations can change.
Beyond fines and removal, the reputational risk to barn owners and event organizers who do not enforce Coggins requirements is significant. Stable owners, horse show and event managers should require and verify current negative Coggins certificates for all horses entering the premises. Failure to do so can expose a facility to liability if an EIA outbreak is traced back to a non-tested animal that was allowed on the premises.
Staying compliant with New Hampshire’s Coggins test requirements is straightforward when you plan ahead. Schedule testing well before any event or travel, work with a USDA-approved laboratory and accredited veterinarian, and keep digital or paper copies of your certificate accessible at all times. For horse owners who also want to stay current on New Hampshire’s broader wildlife and animal regulations, resources on owls in New Hampshire and bats in New Hampshire provide useful context on the state’s approach to animal health and habitat management.