Does my US-born dog need these documents when returning from Mexico?

Yes. CBP applies the same rules to all dogs crossing from Mexico into the US, including dogs originally from the United States. You still need the USDA screwworm inspection certificate and the CDC Dog Import Form receipt.

How do I get the CDC Dog Import Form receipt?

You fill out the CDC Dog Import Form online before your trip. After you submit it, you receive a receipt. Bring that receipt — printed or on your phone — to the border crossing.

What happens if my dog does not have all the required documents?

CBP officers are required to enforce these rules strictly. Your dog may be denied entry, held, or you may face significant delays at the border. It is much easier to prepare the documents before you travel than to deal with problems at the crossing.

Where can I find the most up-to-date requirements?

Requirements can change. Always check the official USDA APHIS Pet Travel page and the CDC's Bringing a Dog into the U.S. page before your trip. You can also visit Screwworm.gov for the latest updates on New World screwworm detections.

Dogs Crossing from Mexico to US: 2026 Entry Rules

Bringing Your Dog from Mexico to the US: 2026 Rules

You packed your bags, booked your trip, and your dog is ready to cross the border with you. But CBP is now strictly enforcing health rules for every dog entering the US from Mexico — and missing one document could stop you at the border. Here is exactly what you need to know before you travel.

Today·2 min read

If you are crossing the US-Mexico border with a dog — even a dog born in the United States — you must meet strict health and documentation requirements. U.S. Customs and Border Protection (CBP) announced on June 26, 2026 that it is actively enforcing these rules to stop the spread of New World screwworm, a dangerous parasite that can harm animals and livestock.

What USDA Requires for Your Dog

The U.S. Department of Agriculture's Animal and Plant Health Inspection Service (USDA APHIS) requires that your dog appear healthy and travel with an official certificate. This certificate must be signed by a full-time, salaried government veterinarian in the country or region where you are coming from. The certificate must confirm that your dog was inspected for screwworm within five days before you travel to the US. It must also state that the dog is either free from screwworm — or was treated for screwworm and held in quarantine until fully clear before leaving.

On top of the USDA certificate, the Centers for Disease Control and Prevention (CDC) requires a separate document for all dogs entering or returning to the US from Mexico. You must carry a CDC Dog Import Form receipt. Your dog must also appear healthy (no wounds or lesions), be at least 6 months old, and have a microchip. CBP officers will check all of these items at the border. If your dog does not meet the requirements, you may face serious delays — or your dog may not be allowed to enter.

What to Do Before You Cross

Visit a licensed veterinarian in Mexico within five days of your travel date. Ask for an official government-issued health certificate that specifically mentions screwworm inspection.
Complete the CDC Dog Import Form online before you travel and bring the receipt with you to the border crossing.
Make sure your dog is microchipped and at least 6 months old before crossing.
Check the latest requirements at USDA APHIS Pet Travel and CDC's Bringing a Dog into the U.S. pages — rules can change without much notice.