The TSA is cracking down on the so-called comfort animals, the ones people bring on the plane because they claim to be too nervous to fly alone. It can be any kind of pet: birds, monkeys, pigs, turkeys. Someone brought an alpaca on the plane. All you need is a note from a joke online doctor. You pay $75 and your pet is officially a comfort animal. It’s easier to get a horse on a plane than it is to get a bottle of mouthwash on a plane.