I travel will bella and they didnt ask for any paper. I just payed 100 for travelling in the cabin. When you pass through security they make you take your dog out and carry him though the gate while the bag goes though the scan, then you put your dog back on the carrier.
It will be fine! bella barked aliitle bit when she was in the airplane but nothing crazy and she didnt like to be there for that long but she had to stay there.
It will be fine! dont worry, its easier than you think!
Good luck!
Dont give him to much water a couple hours before the airplane so he doesnt pee there |