In reply to Dauphin:
As a Brit who lives in North America (albeit Canada) I would think that some of the footage might be more concerning to British sensitivity on animal welfare than it is over here. That isn't to say that there aren't welfare activists over here and, in fact, the whole film (you can get the full version on Netflix) shows that much of the controversy around the Mustangs is driven by welfare concerns.
I guess also, I'm thinking the level of interst there would be less as, although there are some wonderful scenery shots it really ins't a typical BMFF topic even if it did win people's choice.
It is a great film though and I did thoroughly enjoy it.