We recently wanted to find out about how to transport a dog on an Iberia flight (an unusual request we know!), so we decided to contact them via Twitter being very tech savvy here at MuF. They were really friendly and helpful, and got back to us quickly with the info we were looking for. A big thanks to the tweeters @iberia_en , and if you need any info about your Iberia flight, get in touch with them! We recommend them for being pet friendly.
And in case you're interested in travelling with your pet, here's the info in English!