Editor's Note — Sign up for Unlocking the World, CNN Travel's weekly newsletter.For instance, airlines don't allow nope ropes in carry-on bags and only a few allow them to slither around in checked bags, if packaged correctly."Other animals, other bagsSmells the Cat enjoyed Thanksgiving at home in Brooklyn after TSA agents rescued him from a checked bag at John F. Kennedy International Airport.Around Thanksgiving, poor Smells the Cat was found in a carry-on at John F. Kennedy International Airport in New York.Animals need to be removed from carrying cases, and the empty carrier sent through the screening machine, TSA has repeatedly warned."