 At this time, they can sell truckloads of topsoil, peat, or garden mix. 907-252-1891. The concern about the spread of rabies has motivated a change to border crossing regulations. Starting August 1st, the CDC has issued new rules for dogs entering the United States. All dogs, including guide and service dogs, entering the U.S. must be at least 6 months old, microchipped, and with proof of rabies vaccination.