International Pet Travel Dog Travel Forum

I will be traveling by Northwest from Singapore with my 4 lb chihuahua next week. We have lived in SG for 3 yrs and I am returning to TN. I got her rabies shot yesterday and she is a house dog and has never been around any other dogs. I am taking her in a small on board carrier and will be traveling business class. Do you know if I need any other things to get through customs with her? We have a stop in Norita and in Atlanta. I am in my teens and it will just be me and her traveling, so I am nervous about being stopped with her. Any tips about what to do about pottying her on a long flight? (around 24 hours)
Thanks so much for any help