Hi,
I've not discovered any restrictions. She will have a health certificate, certified by a federal veterinarian. Her rabies vaccination dates and serial #'s of the vaccine is included on the health certificate. She is microchipped. Hopefully, I have everything covered. My vet had the health certificate forms, and was quite familiar with the process. The heat restrictions on American Airlines was an issue during May. I didn't want her stuck on a run-way in a kennel for several hours, or risk her health in the heat. So, I'm doing the non-stop on Continental.