Yeah, anything that shows the torture or slaughter of mammals really disturbs me. I skipped "The Cove" for this reason. Although I actually recently watched Blackfish on Netflix, and there was really only one disturbing scene.
I remember when YouTube was a new thing, I saw someone's video...these Alabama rednecks had bought a black panther, and declawed the thing. They had it caged up in their van, and they brought it into an actual clearing in the woods. They released the declawed cat, and set a pack of bloodhounds on it. The video cut out when it was clear that either the dogs were going to tear the thing to pieces, or the rednecks were going to shoot it.
I had a homicidal rage for days after that. I wanted to find those guys, take their guns away, and give them the same treatment they gave that beautiful panther. Still makes me mad.