In reply to Siward:
Slightly different, but I brought my dogs back from USA after living out there. The paperwork was huge and complex, and there are certain things you have to do within 24 hours of flying which may be awkward to organise, especially without local knowledge. you also need to consider heat acclimatising, travel/flying trauma etc, extra immunisations [and side effects].
Unless you are going for a pretty long time I wouldnt bother.