Tired of lugging around a 15-pound tabby? Invest in a bag for carry-on pets

Most airlines have approved softsided carriers, such as the Sherpa bag, for cabin travel. You can buy a model with a removable "travel tray," which is lined, washable, and absorbent. Better yet, you can get one with wheels to give your shoulder a break. (As a rule, pets permitted to travel in the cabin can weigh no more than 20 pounds.)