I have taken Gucci out of the country, we just took her to Turks and Caicos/the Provencialies last month or so..
Tell your vet next week!! Print up the 'requirements' to enter Mexico off of the website and take it in to your vet, they can go over it and make sure you have all the shots in order.
It took us 6 months to get Gucci ready to travel to Turks, because they had very strict rules on health and dogs, they required a microchip, a rabies titer from Kansas state university, a US health certificate (had to drive to the state capital with all of our paperwork) I had to get lots more shots that I probably wouldn't have done otherwise..
Taking a dog into a country withOUT rabies requires a lot of preparation, plan on 5-6 months working with the vet.
Taking a dog to a country WITH rabies, not so difficult, they don't have as many requirements.
I am not familiar with Mexico, but I wouldn't wait til' 2 weeks before to bring it up, talk to someone at the vet familiar with out of country health certification and make sure you have everything covered, they may require shots locally that aren't required where you live, like the lyme/lepto...
As long as you have your paperwork in order, you should get through customs pretty fast. If someone tried to quarantene Gucci, I"d be on the next flight home with her, lol
I have noticed, they DO check the microchip to make sure the # matches on the health certificate both times I've taken her out of the country.
I love traveling with my girl! Look into investing in a stroller, you can take them in lots more places if they are in the stroller