‘Sweetgrass’ drifts so far from the expected narrative or expositional tenets of the documentary format that it’s possible to forget you are actually watching a documentary and feel that, instead, you’re immersed in some kind of Tarkovskian art movie or film-poem.‘Sweetgrass’ exists without narration or “talking heads” interview footage. For the first half hour at least, before a group of unnamed ranchers drive a sizeable herd of sheep through Montana’s...
