You can't make this up. According to Fox News, some bird-brained employee at Delta allowed a turkey on a recent flight through its compliance with the Air Carrier Access Act, which lets customers travel on any airline with their emotional support animals. As long as the passenger provides proper documentation the animal is indeed an emotional support animal, they are required to let the animal on board. If Delta did not comply they could be a subject to a large fine.
I understand why people bring their cat or dog on a flight but a turkey is on a different level. The turkey even got it's own upgraded Economy Comfort seat! If I was that guy sitting behind the turkey in normal economy, it really would have ruffled my feathers. I also wonder if they were serving turkey sandwiches on that flight. Awkward.