Do not even THINK about trying to bring the dog here unless you follow all the import rule to the letter!
If you try to circumvent the rules, your dog could be put into quarantine at the cost of around 8K (from newspaper articles), denied entry leaving you to figure out how to get him back to Mexico, or worst case - and this has happened several times - seized and euthanized.
Do not, repeat, do not, do it!
Rather, look for a reputable rescue or foster home where your dog can stay while following the regs, then import him at the correct time.
You’d then have three choices:
Leave him in Mexico for now then return to Mexico to bring him in yourself,
Leave him in Mexico for now, find a ‘Flugpaten’ who can accompany him to Switzerland while you import him privately under your name,
Leave him in Mexico for now, with a rescue where the rescue then export him as a commercial entity under TRACES, which allows him to be turned over to you.
Actually a fourth option: Stay in Mexico with your dog to complete the steps and paperworl, then return to Switzerland.
See the BLV’s interactive tool for the necessary steps:
https://www.blv.admin.ch/blv/de/home…tchen.html#par
The timing of the microchip is key, as it is what identifies this dog as the one receiving the rabies shot.
Follow each and every step to the letter! Switzerland is very concerned about keeping the country rabies free.
FYI, if your papers are incorrect you likely will not be allowed on the plane.
Dog imporation laws are taken seriously. If you try to get around them it will be apparent when you go to register your dog with AMICUS, and a vet is a mandatory reporter.
If you love this dog, do it right.
Hope it all works out for you both.