I have done this a few times, you have to have a vet certificate from the states, also a pre approval from a belizean registered vet that is here and it has to be faxed to the airport to do it legally, so email or call Jan at saga society at 501-226-3266 before noon and she can fax a certificate stating your animal can enter the country, if all else fails, just be really upset and cry if you have to, threaten to sleep there, they will let you and your dog go on to the island, I have done it all ways, it isn't a big deal.