Earlier quoted context omitted.
If you're asking a personal question like I think you are: for me the courtesy of non-violence extends to all beings capable of suffering and with a preference to live. For a good read on the ethics of eating animals I'd recommend Peter Singer's 'Animal Liberation'
You're aware that plants fill both those criteria: (a) capable of suffering, and (b) a preference to live? What do you eat?
I eat many things, but nothing from animals :)