Ethical. If I wouldn't want people torturing dogs, I have no justification to be okay with people torturing cows, pigs, and chickens
Dogs are genetically selected for living together with humans. As such, and unlike their wolf predecessors, dogs are friendly towards us. In many cases, care is reciprocal, in that we more often care about people who care about us. I propose that chickens don't have even the slightest sense of morality, and don't care whether their siblings live or die. With this in mind, I think it's a somewhat justified to torture birds and low mammals, since they don't care about our or their families' well-being to begin with.
However, I would never torture a chicken unless I was at least 99% sure it had valuable information, and the future of the farm was at stake.
Kin selection suggests that chickens may care about their siblings, and general evolution suggests they definitely care about their children.
...which is exactly the problem. You sound like you're holding a grudge against chickens for not being evolutionarily programmed in a certain way. Let it go. If you set some criteria for "deserving" our respect, of course a lot of animals can't live up to it. But it doesn't seem right to use that as justification for hurting them.
Thought experiment: I take Bob and cut out the part of his brain involved in empathy. Now he can't care about other people, but his thought and emotions are otherwise intact. Is it now okay to torture Bob?
I have noticed that among philosophers, vegetarianism of one form or another is quite common. In fact, I became a vegetarian (technically a pescetarian) myself partly out of respect for an undergraduate philosophy professor. I am interested in finding out if there is a similar disproportion in the Less Wrong community.
I didn't request that this go into Yvain's survey because I want more information than just what animal products you do or don't eat; I'd also like to see nuances of the reasons behind your diet. There are a lot more shades than carnivore/vegetarian/vegan - if you want to be a vegetarian but are allergic to soy and gluten, that's a compelling reason to diversify protein sources, for instance. I'd also like to hear about if you avoid any plant foods (if you think they're farmed in a way that's environmentally destructive or that hurts people or if you have warm fuzzy feelings for plants, maybe). Here are some questions that come to mind: