There was a whole thread about this a while ago - you can do a search for it using the word SENASA.
To go to Uruguay your dog will need:
-- A valid rabies vaccine - the certificate must be at least a month old, and not more than a year old.
-- A health certificate from a vet, dated not more than ten days before the trip.
Get together
1 - the health certificate,
2 - the original rabies certificate,
3 - a photocopy of that certificate,
4 - a photocopy of your ID.
Then go to SENASA to get the proper exit papers. They will give you the original rabies certificate back, along with the official exit papers for your dog. Remember that those papers are good for TEN DAYS only.
There's a forty peso fee for that, and the whole thing takes under half an hour. Your vet may do this for a fee - mine charges a hundred and fifty pesos, so I do it myself. The only tricky part is remembering the deadlines - the rest is simple.
You may want to check with
SENASA
Unidad Regional Operativa
Paseo Colon 367
(1063 ACD) Ciudad Autonoma
de Buenos Aires
Tel: 054 11-4121-5137
(0054-11) 4121-5000 o 0800-999-2386
[email protected]