I'm a converted cat lover and I'm completely on board with the other experienced cat people who have weighed in. You can get a cat used to wearing a leash and travelling if you teach them when they are a kitten. For those of us who get adopted by a stray, that isn't possible. Most cats associate the carrier with going to the vet and with something bad about to happen to them when they get there. They don't do well in strange environments and around a lot of noise. We humans want to rip most screener carnival barkers to shreds. Imagine what a cat with its enhanced senses is thinking when it encounters a carnival barker? I fully recognize that some people must travel with cats for certain reasons. For me, I would have to be in dire straits to subject either of ours to all that stress.