I know I'm in the minority here but my cat DoraMae travels with me when I will be home for long periods of time (12 hours to Kentucky, 8 hours to Alabama, and has been to Key West). When she sees her harness and leash she isn't happy but once in the car about 20 minutes she settles down and is along for the ride. I take a litter box but she has never used it. I will give her a few treats here and there along the way as I don't feed her the morning we are heading out due to car sickness. If she has eaten she will get sick but once that is over she is good to go. I know some people think I'm crazy but I want this little fur ball with me vs leaving her at home even though she has a "Cat Nanny" who takes care of her when we are away for just a few days. I am impressed she does as well as she does but I'm so glad she does. The day she showed up to my house 4 years ago (declawed I might add) I don't think she expected to have thousands of miles under her belt.