HelloCustomer thankyou for your question.
US visitors to Mexico may bring a dog,cat or up to four canines by presenting the following certificates at the border:
Certification by Mexican authorities is not required for the health certificate or the vaccination certificate.
A Permit fee is charged upon entering Mexico.
Here is an excellent site for those visiting Mexico:
Tips for Travelers to Mexico
Have a happy trip.
If you feel this information was helpful please click accept and leave a positive feedback.