Just an update:
I had this bird quarantined since I got back from the show. I quarantine every bird that goes to a show for safety. He had absolutely no symptoms at the show, but he went to quarantine anyway. He started showing symptoms about two-three days after the show. I gave him 0.5cc of Tylan 50 yesterday morning and today the swelling has gone down tremendously. Going to keep an eye on him for the next week. He's getting poultry cell in his water as well. Keeping an eye on the pullet that was caged next to him, but she hasn't shown any symptoms yet.