I know several people who have traveled with cats and with planning, it’s been fine.
Leash and harness training is critical. I trained my own cats last summer when we moved to a new house. It took a few days and they were fine with it. There are all kinds of videos about it.
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My friend spent about a month moving across country by car with two cats. They let the cats roam in the car. At rest stops, they let the cats out to explore with leashes. It’s important to leash train the cat before you do this. Leash walking cats is becoming very popular and isn’t that hard.
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Another friend took her cat out on the sailing boat every weekend in the summer. The cat wandered on deck and below as they sailed the eastern seaboard.
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My niece recently moved her two cats to the Netherlands and back. It was a pain but they all got through it.