Is Casey Dead on Yellowstone?

Is Kayce Dutton dead? Probably not. Still, only John has had robust conversation with Kayce since his return. In episode 2, Kayce stands alongside Rip and John while the ranch hosted Travis, but Rip only responds to Kayce once—and the response could have just been Rip talking.

What happens to Casey in Yellowstone?

He moved away from the ranch, bought a house with Monica. And the two are having another child.

Is Kayce in Season 4 of Yellowstone?

At the end of Season 4, Kayce goes on a deeply transformative vision quest. He takes himself to a patch of deserted land and embarks on a spiritual journey that opens old wounds, forces him to deal with past traumas, and teases the end of someone (or something) in Season 5.