Rocky has been extremely hormonal lately; Thomas has had to watch his body language more closely than usual to avoid a bite. He gets too worked up and then needs to calm down.
Rocky was trying to bite him over the weekend, so Thomas grabbed him to calm him down:Notice how ratty his tail feathers are getting from wandering around the floor and nesting under his cage! Then, Thomas decided to let Max preen his tail a bit. She will frequently try to preen his tail when they're both walking around the floor, but he doesn't allow it.
He didn't really seem to mind it, as you can see from the video -- look for quick glimpses of Stella and Calypso on the stands as well: