I originally misread this post and thought you were coming from the UK and solicited this reply from someone that recently brought a dog:
"argentina has no quarantine for dogs from the usa, if you provide the necessary paperwork. the dog needs to have been given a rabies shot within the year of entering the country. also, up to date on the rest of the normal shots. then within 10 days of entering the country you have to go to a certified vet (most in the us are) and have them fill out the 7001 form. you bring this form to your state's usda and they stamp/sign/seal it. also, the dog must have a microchip or the form may be incomplete. the vet can find that out for you. so with all that, i was able to enter argentina and bring my dog with my right away. you pick the dog up at baggage claim and through customs they look at your paperwork. you pay a nominal fee (more on weekends) and that's it. it didnt even take long to get through customs.
hope that helps. "
Not that helpful for you, I guess, but maybe someone else.