I know it's been said before, but can I just reiterate that intensive farming for pulses, grains and vegetable oils causes immense human suffering, ecological damage and wildlife extinction?
No matter what your diet or what species you are, eating causes harm to other life forms. It's the food chain, innit. As humans in a developed country, we have the luxury of choosing a diet that fits our circumstances and moral priorities.
Me, I enjoy eating meat and am aware there wouldn't be ANY friendly cattle or charming lambs, if not for livestock farming. My morals would be happier if there were less wastage - if all meat carcasses were skinned for leather, for example - but the fluffikins argument cuts no ice with me because it's illogical.