Whether the pet is relocating as checked baggage or as cargo they will wind up in the same special area of the cargo compartment (at rear part of the plan), which is pressurized and temperature controlled.
All animals must be in an IATA* approved container and meet certain other requirements. It is considered best to have only one animal per container but the IATA rules state that two animals can share the same container if the animals are under 14kg (30lbs).
The container must be large enough for the animal(s) to turn around, stand and sit up. The container must have a secure all around locking system with the pins extending beyond the horizontal extrusions above and below the door.
A water container must be present and must be accessible from outside the container. The container must have ventilation on all four sides.
The container must be identified with the pets name and owners contact information. You should attach an extra copy of the pets health certificate to the container.
International pet relocation does require planning; however, if you follow some simple steps. The most important thing to remember is that just like with human travel, pets also need additional documentation in order to relocate to a new country. It is also important to check with the country of origin, let them know where you are relocating to, and ask what documentation you will need for re-entry.
* All (IATA) approved container are available for sale.
Useful links to relocate you pet
Pet Relocation Form
Dog Relocation Box
Cat Relocation Box