Since the beginning of 2015, the Iberia Group has transported more that 29,000 pets on its aircraft, a 13% increase from the total in January-August of last year. Pets can be carried both in the passenger cabin and the cargo hold. All must travel in carrier boxes that are sturdy, well-ventilated, and have waterproof bottoms. Pets weighing less than 8 kg. can usually travel with their human companions...