I'm vegetarian, so it isn't a question personally affecting me, but I don't see why people are willing to eat one type of animal (something humans happened to domesticate a long long time ago) but not others. And even if you use the intelligence argument, how are you going to determine an animal's intelligence, and where do you draw the line? At some point you're going to have an animal only slightly more intelligent than another and be willing to eat one but not the other. Before I became vegetarian I got along eating meat by pretending it hadn't been something else first. I knew that if I had to kill my own I would become a vegetarian because I wouldn't be able to kill an animal (except for my own survival. If it's me or them, I choose me). I think people are less willing to eat dogs or horses because they know them personally, so it's harder to pretend it wasn't previously some cute and fluffy animal. Well, that and tradition, dogs and horses had other uses for society so they didn't eat them, and since they never ate them we won't eat them now either! A couple months before I could vote California had an election where they passed a law banning horsemeat I believe (they might come and steal my pet horse and butcher it for meat!)