that's not a valid argument :)
The comparison of Holocaust victims with animals killed at slaughterhouses is insulting. The film uses doubtful methods of reasoning with the main of them being shock, which is more of the characteristic of a propaganda movie than a documentary one. I haven't found any inner discussion in it as well as any more or less serious attempts to fathom animal psychology and perception of pain/suffering.
On the subject of science, consciousness, and the comparative importance of animal and human suffering, see the following post on the scientific announcement that animals are as humans in the possession of self-reflective consciousness. There are no more excuses, M. Babkin. | http://www.kurzweilai.net/animals-are-conscious-and-should-be-treated-as-such
I wouldn't say I'm a fan of this documentary, but it's definitely potent and visually powerful. The images stayed with me for days, enough so to influence my lifestyle.
I agree with this comment - I clicked "become a fan" but not because it's not because I am proud to like a movie on this topic. It's because I am a fan of its importance and the impact it can have on those who watch it. I highly suggest viewing this film because the brutal truth displayed is necessary to improve our lives, and the lives of other beings and the planet.