Every year, thousands of families relocate to the United States — and a significant portion does so with their dogs and cats. It is one of the most traveled pet relocation corridors in the world, and also one of the most confusing when it comes to requirements.
This guide covers everything you need to know to enter the United States with your pet.
The Regulatory Framework: Who Controls Pet Entry into the USA
In the United States, animal entry is regulated primarily by three agencies:
- CDC (Centers for Disease Control and Prevention): regulates the entry of dogs, especially in relation to rabies.
- USDA APHIS (Animal and Plant Health Inspection Service): regulates animal health and veterinary certificates.
- US Customs and Border Protection (CBP): conducts the physical inspection at the port of entry.
CDC rules were updated in August 2024. It is important to verify the current requirements at the time of your trip, as rabies vaccination regulations have changed recently.
Step 1: The Microchip
The United States accepts microchips of various standards, including ISO 11784/11785 and some 15-digit American formats. However, to ensure the chip is readable at entry point scanners, the ISO standard is the safest option.
If your dog has a chip in a different standard or proprietary format, check with your vet for compatibility. If in doubt, a second ISO chip can be placed without issue.
Step 2: The Rabies Vaccine — The Most Critical Requirement
Following the CDC's 2024 changes, rabies vaccination requirements for dogs entering the United States are as follows:
- Dogs vaccinated against rabies abroad must be able to demonstrate that the vaccine was administered in a country not considered high-risk for canine rabies, or that it was applied in the United States, or that it meets the specific CDC requirements for dogs vaccinated outside the country.
- Dogs that have never been vaccinated (generally those under 6 months old) face stricter entry restrictions and may require quarantine.
The situation is more complex than in previous years. Before booking any flight, consult the official CDC page (cdc.gov/importation/dogs) to verify current requirements based on your dog's country of origin.
Step 3: The Veterinary Health Certificate
For most dogs entering from outside the country, a veterinary health certificate attesting to the animal's health status is required. This certificate must:
- Be issued by a veterinarian accredited by the relevant authority in your country.
- Include the microchip number, vaccination history, and owner information.
- In some cases, require official legalization or endorsement.
- Be valid for 10 days from the date of signature.
The Official Veterinary Certificate by Country
United States (from abroad)
The health certificate must meet USDA APHIS standards. The issuing veterinarian should be accredited or federally authorized in the country of origin. Contact USDA APHIS directly or through a specialized pet transport company to confirm the current correct form for your specific route.
From Canada
Canadian pets have a simplified entry process with a valid rabies vaccine certificate and standard CFIA documentation.
From Mexico
The competent authority is SENASICA (Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria). The process includes the International Zoosanitary Certificate issued by an official or approved veterinarian.
From the European Union
Dogs coming from EU countries must comply with CDC requirements in force at the time of travel. The EU pet passport is generally not sufficient on its own and must be accompanied by additional documentation meeting US standards.
What to Expect at the US Port of Entry
Upon arriving at a US airport with your dog, you will pass through Customs and Border Protection (CBP). The officer will review:
- The dog's microchip (with a portable scanner).
- The veterinary health certificate and rabies vaccination.
- The animal's visible health condition.
If documentation is in order, the process is quick. If there is any inconsistency or incomplete documentation, the animal may be held for additional inspection or, in extreme cases, returned to the country of origin.
Most-Used Entry Cities
- Miami (MIA): the main hub for flights from South America and the Caribbean. Has specific infrastructure for live animals.
- New York JFK: common for flights from Europe and some South American routes.
- Los Angeles (LAX): for routes from Mexico, Central America, and western South America.
- Houston (IAH): important hub for Mexico and Central America.
Timeline for Relocation to the USA
| Timeframe | Action |
|---|---|
| 10 to 12 weeks before | Verify microchip, rabies vaccine status, consult current CDC requirements |
| 8 weeks before | Rabies booster if needed, begin crate acclimatization |
| 4 to 6 weeks before | Book transport service, confirm airline, purchase IATA crate |
| 10 to 14 days before | Appointment with accredited vet for the official health certificate |
| 7 to 10 days before | Legalization of certificate by official authority |
| 3 to 5 days before | Receive legalized certificate, prepare crate documentation pack |
| 24 to 48 hours before | Final review, last meal 6 hours before, exercise, freeze water dispenser |
One Piece of Advice Most People Overlook
Beyond the paperwork, the travel experience depends greatly on how much time you have spent preparing your dog for this moment. Dogs that arrive calmer in the United States are not the ones with the most documents — they are the ones that traveled in a crate they already knew as their safe space.
Emotional preparation cannot be improvised. Start crate acclimatization at least 6 weeks before departure.
