Moving Cattle Across State Lines to Colorado: CVI, Brand Inspection, and Permit Rules Explained

Before you load a single animal, you need to know that Colorado does not treat all cattle the same way at the border. A load of feeder steers headed to a dry lot faces a different checklist than a trailer of lactating dairy cows or a truck of registered bulls bound for a breeding operation.

Get any one of those pieces wrong, and Colorado’s State Veterinarian’s Office has the authority to hold your animals in quarantine at your expense until the paperwork catches up. This guide walks you through the identification, testing, permitting, and brand inspection rules you need to have in hand before your trailer crosses into Colorado.

Cattle Class and Purpose of the Move Into Colorado

The single biggest variable in Colorado’s import rules is not where your cattle are coming from — it’s what class of cattle you’re hauling and why. Different cattle breeds and different production purposes trigger entirely separate rule sets, and Colorado’s own regulations spell this out by category: breeding cattle, feeder cattle, slaughter cattle, dairy cattle, and rodeo cattle each have their own entry requirements.

A Texas rancher who regularly ships interstate put it plainly: “It is possible for regulations to vary between bulls shipped for breeding and heifers moved for grazing in a different state or country,” and each load may need different treatments depending on the destination. Texas Animal Health Commission staff echo this, noting that “All animals must meet the minimum interstate requirements for livestock movements set by USDA,” while individual states can layer on stricter rules.

Before you book transport, decide exactly how the cattle will be used once they arrive: breeding stock going into a herd, feeders headed to a Colorado Approved Feedlot, dairy replacements joining a milking string, or animals moving straight to slaughter or a livestock market. That single decision determines which identification, testing, and permit rules apply to the rest of this checklist.

Pro Tip: Call your veterinarian before you finalize a purchase, not after. The class and intended use of the cattle determines which tests need to be scheduled, and several of Colorado’s required tests have to be completed within a specific window before entry.

Official Identification and RFID Tags for Interstate Cattle

Under the USDA rule that took effect in November 2024, certain cattle moving across state lines must carry 840 RFID ear tags, a requirement that applies to sexually intact cattle 18 months and older, all dairy cattle, and several other classes moving interstate. Colorado’s own import standards build on that federal baseline.

For breeding and dairy cattle entering Colorado, the state requires USDA Official Identification required (840 RFID tags, Silver “brite” tags (placed prior to 11/05/2024), or orange Brucellosis (OCV) metal ear tags (placed prior to 11/05/2024)). Older silver and orange tags remain acceptable only if they were applied before that November 2024 cutoff — any animal tagged after that date needs a current 840 RFID tag.

Colorado’s Certificate of Veterinary Inspection standards also require that when available, NAIS premises identification shall be listed, and when available, RFID devices shall be recorded on the CVI either electronically or written. In other words, the tag number isn’t just on the animal — it has to match what’s written on your health paperwork, or the load can be flagged at the border.

Disease Tests and Vaccinations Colorado May Require

Tuberculosis and trichomoniasis testing sit at the center of Colorado’s disease-control program for interstate cattle. For breeding cattle, Colorado requires a negative tuberculosis test for cattle 6 months of age or older within 60 days prior to entry into Colorado. Rodeo cattle get a longer window: negative tuberculosis test required for all rodeo cattle that are 6 months of age or older within 12 months prior to entry into Colorado.

Bulls face an additional hurdle. Colorado requires a negative official Trichomonas foetus PCR test (individual or pooled) for bulls 12 months of age or older within 60 days prior to entry into Colorado, and that clearance stays valid only if the bull is kept separate from females afterward. There’s no workaround for bulls from a known-positive herd — bulls from a known trich positive herd are not permitted to enter Colorado regardless of test status.

Colorado also maintains a Certified Brucellosis Free status statewide, and its import rules are built partly to protect that designation through continuation of slaughter and sale surveillance programs, control of import animals appropriately by origin and use, and vaccination as long as it is an effective tool. If your cattle originate from a state or region with a different brucellosis or TB status, expect additional testing or vaccination documentation.

Important Note: Test windows are measured from the collection date to the date of entry, not the date you schedule the test. Book bloodwork and PCR testing early enough that lab turnaround doesn’t push you past the deadline.

Extra Rules for Dairy Cattle, Including HPAI / H5N1 Testing

Dairy cattle face the strictest entry standards of any class moving into Colorado, largely because of the ongoing response to highly pathogenic avian influenza in dairy herds. Colorado’s Department of Agriculture issued an Emergency Rule effective April 30, 2024: lactating dairy cattle imported into Colorado must have a negative test for Influenza A within 7 days prior to movement. That result isn’t optional paperwork kept in a file — the lactation status and negative test results must be recorded on the CVI itself.

Beyond HPAI screening, dairy cattle entering Colorado for breeding purposes must meet the same tuberculosis and trichomoniasis standards as beef breeding cattle, plus the identification requirements covering brite, OCV, and 840 RFID tags described above. If your dairy cattle are moving to slaughter or an Approved Feedlot instead of into a milking herd, some of these tests carry exemptions, which the direct-pathways section below covers in more detail.

Common Mistake: Producers sometimes test cull dairy cows for Influenza A but forget that the seven-day window is measured backward from the movement date, not the arrival date. If transport gets delayed, the test can expire before the trailer even reaches Colorado.

Certificate of Veterinary Inspection (CVI / ICVI)

The Certificate of Veterinary Inspection is the backbone document for any interstate cattle move into Colorado. By regulation, an official CVI is the legibly completed official form both written and electronically generated and approved by the state veterinarian of the state of origin and issued by a licensed accredited veterinarian. There is no shortcut around the in-person exam: inspection for issuance of CVI must be completed in person by the accredited veterinarian, and virtual or telemedicine inspection is not accepted.

Most classes need a CVI issued within 30 days of arrival — rodeo and Canadian-origin cattle both fall under that same 30-day standard per Colorado’s rodeo cattle import page, and breeding and dairy cattle follow a similar timeline. If you’re working with an electronic CVI, there’s a practical shortcut: eCVIs created through VSPS, GlobalVetLink (GVL), VetSentry, Vet-CVI, or myVetTech that submit a CVI directly to Colorado less than 24 hours after endorsement do not require a permit.

Keep in mind that a CVI without required test results, ID numbers, or a permit number attached is functionally incomplete. Colorado’s own standards make clear that the certifying veterinarian’s language on the document states the vaccinations and results of tests are as indicated on the certificate, and to the best of my knowledge, the animals listed on this certificate meet the state of destination’s and federal interstate requirements. If any field is blank, expect delays at the state line.

Entry Permits From Colorado Animal Health

Some cattle classes need more than a CVI — they need an import permit issued before the animals ever leave their state of origin. Colorado defines this as a permit issued by the State Veterinarian to an accredited veterinarian at the livestock’s point of origin and used for the interstate import into Colorado.

Getting one is straightforward if you plan ahead. Veterinarians can use the Online Permitting System (OPS) for obtaining livestock entry permits, and more information about OPS can be found on the OPS Resource Page. If the online system isn’t practical for your situation, livestock entry permits can also be obtained by calling the Colorado State Veterinarian’s Office at (303) 869-9130.

Permits aren’t always required. Some import requirements may be waived if cattle are moving to a Colorado Approved Tagging Site or a Colorado Approved Feedlot, since those destinations carry their own on-site identification and containment controls. Skipping the permit step when one is required, though, carries real consequences: animals entering Colorado without a valid CVI or permit number, or both if required, may be held in quarantine at the owner’s expense until released by an authorized representative of the State Veterinarian.

Brand Inspection and Proof of Ownership

Even after your cattle clear health and identification requirements, Colorado’s Brand Inspection Division has its own separate checkpoint tied to ownership rather than disease. Colorado’s brand board carries six core duties, including the authority to inspect livestock and verify ownership before any change of ownership, transport over 75 miles within Colorado, transport to a location outside Colorado, transport to sale, and transport to slaughter.

Brand inspection is mandatory on cattle, horses, mules and donkeys statewide, and Colorado’s Brand Inspection Division processes an enormous volume of livestock every year through a network of inspectors positioned across the state. If your cattle don’t carry a registered brand, that’s not an automatic pass — Colorado’s own livestock and property laws still require proof of ownership, and inspectors document identifying marks, color, sex, and age when no brand is present to establish who legally owns the animal.

Fee structure matters here too. Colorado law generally requires a brand inspection fee on cattle moved for a change of ownership, but carves out exceptions when cattle and calves are being moved in excess of seventy-five land miles within the state for grazing purposes if no change in ownership is involved. Interstate moves into Colorado, by contrast, almost always require the full inspection and certificate regardless of distance, since ownership or location is changing.

Pro Tip: Line up your brand inspection at the same time you’re finalizing the sale or shipping date. Inspectors need advance notice, and a missed inspection window can strand a load that’s otherwise fully compliant on health paperwork.

Direct-to-Slaughter, Market, and Other Limited Pathways

Not every load into Colorado needs the full battery of tests. The state builds in narrower pathways for cattle moving to specific, controlled endpoints. A Colorado Approved Feedlot, for example, is a confined feedlot area approved and recorded by the State Veterinarian, maintained for growing and/or finish-feeding of animals in dry lot with no provisions for pasturing or grazing. Cattle can sometimes enter these facilities with reduced testing, but animals leaving such a feedlot must move directly to slaughter or to another Colorado-approved feedlot and must be accompanied by a current brand inspection certificate.

Testing exemptions follow the same logic across several categories. Dairy cattle from Canada, for instance, skip a mandatory TB test if they’re consigned to an approved livestock market and tested prior to release, sold directly to slaughter, or sold to an Approved Feedlot. Trichomoniasis testing carries a similar carve-out for bulls sold directly to slaughter or into an approved feedlot rather than into a breeding program.

If an animal doesn’t meet import standards after arrival, Colorado doesn’t simply turn it away at will — the state veterinarian has defined options: the State Veterinarian may order that an imported animal failing to meet import requirements be returned to its state of origin, consigned directly to slaughter, or confined to a Colorado Approved Feedlot. Knowing these limited pathways ahead of time can save you from an expensive surprise if a single animal in a load fails testing.

Papers That Must Travel With the Load

Every interstate cattle shipment into Colorado needs a specific paper trail riding in the truck, not just filed at the office. At minimum, that includes a Certificate of Veterinary Inspection for interstate moves, proof of ownership (registration papers, bill of sale, or brand inspection), and any import permits required by the destination state. Keep every document physically accessible during transport.

This isn’t a formality. Roadside inspections can occur, and failure to produce required paperwork can result in animals being held at the state line. Beyond Colorado-specific paperwork, federal welfare law also applies to the trip itself: the Twenty-Eight Hour Law requires that animals being transported across state lines by truck be unloaded for rest, water, and feeding after 28 consecutive hours of transport, with the rest stop lasting at least 5 hours.

If you’re hauling from a neighboring state and considering an interstate move through Wyoming or comparing notes with a Wisconsin shipment, remember that each state sets its own combination of these documents — a packet that clears one border doesn’t automatically clear Colorado’s.

Pre-Load Checklist Before You Cross Into Colorado

Run through this sequence before the trailer leaves the yard:

1. Confirm the cattle class and destination use — breeding, feeder, dairy, rodeo, or direct slaughter — since this determines every downstream requirement.
2. Verify official identification is applied — 840 RFID tags for new tagging, or pre-existing brite/OCV tags placed before November 5, 2024.
3. Schedule required disease tests early — TB, trichomoniasis for bulls, and Influenza A for lactating dairy cattle, allowing for lab turnaround inside the required windows.
4. Book the accredited veterinarian visit for an in-person CVI inspection within the required window before departure.
5. Apply for an entry permit through the Online Permitting System or by phone if your class of cattle requires one.
6. Schedule brand inspection in advance of your shipping date so the certificate is ready when the truck loads.
7. Assemble physical copies of the CVI, permit number, brand certificate, and bill of sale, and place them in the truck cab.
8. Plan transport timing around the federal 28-hour rest requirement if the haul will run long.

Where to Confirm Current Colorado Cattle Import Rules

Requirements shift with disease outbreaks, USDA rule changes, and seasonal risk factors, so treat any written guide — including this one — as a starting point rather than a final answer. As one Texas Animal Health Commission representative put it, “Producers and haulers should always call the state of destination to ensure they meet all entry requirements.”

For Colorado specifically, the Colorado Department of Agriculture’s Animal Health import requirements page lists current class-by-class rules, and the State Veterinarian’s Office can be reached directly at (303) 869-9130 for permit questions. For ownership and brand questions, the Brand Inspection Division handles certificates and can clarify whether your specific route or sale triggers an inspection requirement.

A list of state animal health officials is available online under Resources on the United States Animal Health Association website, which is useful if your cattle are passing through additional states before reaching Colorado. If you’re also moving other animals alongside livestock, Colorado’s broader pet import laws follow a separate set of rules worth checking before the same trip. And once your herd is settled on Colorado ground, it’s worth reviewing the state’s other Colorado animal and agriculture regulations that may affect day-to-day herd management.

Important Note: This article summarizes publicly available Colorado import regulations as a general reference. Rules tied to disease outbreaks such as HPAI can change with little notice, so confirm current requirements with your accredited veterinarian and the Colorado State Veterinarian’s Office before finalizing any shipment.