We had friends who had a dog onboard in the Caribbean. Had all the shots, a pet passport (I thought they were kidding, they weren't). In a standard winter cruising they said they spent $2000 for various fees. I think they avoided Antigua because the dog would have to go into quarantine there. It was a lovely dog, but they said never again.Do you happen to recall which countries were an issue with the cat? We've decided the dog needs to go to family. I wasn't really sold on the idea of turning our boat into a modern day Noah's Ark, anyways. One cat...that's it.