A FOOD DEATH CONNECTION?

As much as i enjoy being in a (LESBIAN HOUSE DINING-in wimmin-only-space) , i do on occasion come away feeling uneasy because of the willingness of the wimmin to talk about anything and everything and they do.The questions asked are always heart rendering and thought provoking. One womon asked, is it necessary to kill in order to eat? I said for some animals i suppose this is so. Then i got to thinking which animals? well cats kill birds and eat them, sharks kill humans and eat them, dogs kill cats but i have never seen a dog eat a cat, that doesnt mean that it does not happen. I went on birds kill worms and eat them, bears kill fish and eat them, so i ask again is it necessary to kill in order to eat? Is it necessary for humans to kill in order to eat? Do other animals kill just to kill and to not eat? Do human animals kill just to kill and not to eat? Is killinng ever justifiable? and if so When? and who does the justifying?