Information on the importation of dogs, cats, turtles, monkeys and other animals and animal products capable of causing human disease. Pets taken out of the United States are subject, upon return, to the same regulations as those entering for the first time. The US government does not require general certificates of health for pets. However, because airlines sometimes require health certificates for pets traveling with them, you should check with your airline prior to your travel date.
Also see Frequently Asked Questions about Importation of Animals. It provides answers and links to pertinent regulations and documents governing such importation.