Assuming you can make satisfactory arrangements with the airline to
transport your dog from Brazil to the DR you will have no problems bringing
your dog with you as long as he/she has an up to date health certificate.
Suggest you check with the consulate in Brazil to determine if the certificate
has to be consularized.
We broudht our dog with us last April from the USA and all that was required
was a Veterinarins health certificate and the payment of 300 pesos when
Good Luck and Welcome to the DR.