Have you seen Fido (2006)? Billy Connolly, Carrie-Anne Moss, Dylan Baker, Tim Blake Nelson, it’s a mashup of the old Lassie TV series and Night of the Living Dead, where zombies are domesticated and turned into free labor. I don’t think I’ve ever seen it brought up on horror forums so maybe it slipped through the cracks, idk.
I remember watching Fido and thinking this is a weird, Canadian film. Watched back to back when we rented it from the video store.
I wouldn't really say it's a horror film. Definitely a weird, early 2000 comedy film.