@RogerK i haven't done this part yet (only have brought a dog into Argentina from the USA), but i would definitely consider changing plans as
@milo mentioned - the USA CDC just changed 01Aug2024 the list of countries and requirements with High-Risk-of-Rabies stuff. i am only considering taking my dog to Uruguay, Paraguay, and Argentina right now, since all the other nearby countries will "flag" my dog as at risk of Rabies for several months. i want to be able to return to the USA, or go somewhere else, without having this limitation possibly messing with my plans.
this blog by
@Nomadoggo covers the process USA->Argentina with a Service Dog, but i think you might be the first person doing this Argentina->Brazil on this forum. for sure starting at a good SENASA-qualified Veterinarian near you will be the best bet, as they probably do this stuff all the time. the only thing to watch for is the lack of info on SENASA/Argentina's sites, because sometimes the requirements are different (whereas the USDA APHIS site is always up-to-date)
My blog, "Nomadoggo," serves as your ultimate guide to traveling the world with your dog. From pre-trip preparations and essential gear to navigating international regulations and finding pet-friendly accommodations, we cover it all.
www.nomadoggo.com
if you document the process, i'm sure
@Nomadoggo would add your experience to that site, so others would benefit. i know i would be interested in seeing the process, time, and total cost.
buena suerte, and smooch that pooch for us!