This is a difficult one because if we look closely even just to eat anything causes the death of other living beings. The plowing of the field, I have been a farmer so I have seen it, insects are chopped up, the flooding of the fields, many beings drowned. The spraying of fruit, many beings are poisoned. And even if they are organically grown, I also knew a farmer who poisoned the birds because they ate the bananas. So, even if we are vegetarians there are many living beings who die for the support of our body. So, it's important to understand that if we want to get out of harming living beings totally, we have to become enlightened and not have a body to support.