That's really great of the airline. Too bad they don't fly from Mexico to the States.
I think I'm allowed 1 dog up to 22 pounds in the cabin. But it's weird because when you look at their site in Spanish and in English it says different things, or lacks information. On the Spanish part it says you can have only 1 kennel per passenger, but it doesn't say the number of pets you can have. On the English part it says you can have up to 22 pounds of pet per kennel. But I just noticed something: it says that only 1 pet is allowed per person if the dog is going to be put in cargo. My baby never flies in cargo. I guess that's a loop hole.