If you have a cat, a cat carrier is one item you absolutely must have. With the exception of walking a trained cat with a harness and leash, you should never take your cat outside unless she's secured inside a cat carrier. Emergencies, medical or otherwise, are always a possibility, so you...
Most cats are not good travelers. They like having their familiar established territory and couldn't care less about seeing the wonders of the Great Beyond. You're not very likely to ever come across a cat sticking its head out the window with its ears flapping in the wind...
But sometimes...
It is time to go to the vet, and suddenly Fluffy is nowhere in sight. You just brought the carrier out of the closet, and thought you saw Fluff dive under the bed, so you peer underneath the bed and there she is hunched in the farthest corner hissing at you. Try as you might, you can't get her...