When we brought El Gato (George) down a year ago we had taken him to the vets and had all his paperwork, shots, etc, current. He was in his travel case between us in front but they never said a word. We didn't think they would but since it was hot (September) and we had to be in Penasco at one pm to sign papers for a our new home, didn't want to take any chance that we would have to go find a Vet in Ajo in order to get him through. Especially since he looks like a minature leopard. We did give him a kitty cocktail because otherwise he would have yowled and roared at top pitch for the 6 1/2 hour trip - so he was pretty much sleeping when we went through.