Cats mostly meow to humans — in greeting, to get attention, and of course, when they want food. The length and volume of the meow, and your cat's body language, can offer clues about their mood.

My original Cat’s Meow, from 2009, accompanied me on many college trips to Big Sur, Lake Tahoe, and the Sierras. Once I graduated, I ventured overseas and hit the trails in New Zealand with my ...