Not VR, the chickens live a real life as fulfilled and self actualized as a chicken could be. At any rate it doesn't even really matter (from the chicken pov) whether its real or not because as I said, from all the available evidence chickens don't have the innate capacity for existential dread. A chicken doesn't and can't care what happens to it's corpse after its dead or the evolutionary arc of its species. The only ones who care are a few humans projecting anthropomorphic traits on to them.