Last updated August 20, 2026 · Independent guide — not affiliated with USDA or SENASICA
San Antonio is the staging city for much of the central-Texas traffic heading to the Laredo and Eagle Pass crossings, both about 2.5 hours away, and the airport flies nonstop to Mexico City, Monterrey, Cancún and Guadalajara.
The requirement: since August 3, 2026, dogs entering Mexico from the US must carry an NWS Inspection Certificate signed by a USDA-accredited veterinarian within 5 days of arrival in Mexico. No APHIS endorsement is needed — the signed form is presented at the Mexican border or airport. Full guide here.
Vets offering screwworm certificates in San Antonio
We're verifying San Antonio clinics now.
This requirement is weeks old and clinic participation is changing daily. Used a San Antonio vet for your NWS certificate? Tell us and we'll list them for the next traveler.
Can't find an accredited vet in San Antonio?
- Call clinics that advertise international health certificates — they're the most likely to have a USDA-accredited vet on staff.
- Ask the exact question: “Can a USDA-accredited veterinarian at your clinic complete the NWS Inspection Certificate for Pet Dogs going to Mexico?”
- Contact the Texas USDA APHIS Veterinary Services office for a referral, per the official APHIS guidance.
- Download the form ahead of your appointment from the APHIS Mexico pet travel page — many clinics haven't seen it yet.
How to find a USDA-accredited vet →
Are you a San Antonio veterinarian issuing NWS certificates? Get listed — free while the directory grows.