The new rule restricts animal companions to qualified service dogs with blind and otherwise handicapped passengers. This rule specifically bans so-called emotional support animals. There have been complaints and problems for airlines and cruise ships when people bring aboard untrained cats, birds, hamsters and other animals that cause troubles for other passengers. So, if you’re thinking of bringing Fluffy and/or Fido with you on your next journey, first check the latest restrictions and how they may apply to your plans.