With the exception of assistance dogs, only a few cruise lines accept pets normally only on ocean crossings and frequently confined to kennels.
Some lines permit pets in private cabins.
Contact cruise lines in advance to find out their policies and which of their ships have kennel facilities. If you must use the ship's kennel, make sure it is protected from the elements. Follow the general guidelines suggested for other modes of travel when planning a ship voyage. Traveling by Train Amtrak currently does not accept pets for transport unless they are assistance dogs. Many trains in European countries allow pets.