Xombie: Dead on Arrival (2003)

In a future plagued by legions of undead creatures, both human and animal, the earth is a dark and dangerous place — not only for the few remaining humans who still cling to life, but for a unique group of zombies who remain mysteriously self-aware, torn between their new-found cravings and a lingering moral sensibility. Armed with reason, and impervious to death, their world is one of darkness — a nightmare from which they cannot awaken.