Crates used for pet travel by air should be air travel approved. These crates should be purchased from the airline or at a local pet store. Crates should be: For Air Cabin and Air Cargo travel: Large enough for the pet to stand (without touching the top of the crate), turn around and lie down. Have a leak-proof bottom with plenty of absorbent material Be ventilated on opposite sides, with exterior knobs and rims that will not block airflow For Air Cargo travel: Be strong and free of interior protrusions, with handles or grips. Most airlines will not allow snap-sided kennels, modified or adapted snap-side kennels or collapsible or folding kennels Be clearly labeled with owners name, home address and phone number, destination contact information and a sign stating “Live Animals” with arrows showing which way is upright Airlines may also have additional requirements regarding crates. The pet owner should contact the air carrier's cargo department to ensure all requirements are met before the pet's travel.