Here is a hard hitting documentary from the Vegetarian Society in England, it was written by Tony Wardle and is narrated by Paul McCartney (the ex-Beatle).
This is a short documentary made by The Energy and Resources Institute in New Delhi, with reports on the effects of pesticide use from around the country. The results are, I think, unambiguous and telling.
A film about the relationship between people and animals. Shockingly violent.