I used to be a vegetarian as a youg adult as a matter of principle.
The north American indians whom I share partial heritage with were mostly vegetarian during summer (2 days

) and meat eaters during winter. With the winters here, they had to eat meat because snows were so thick. As they were always on the move, they also couldn't afford to carry much food from harvests, although they used caches at some point.
What I retain from that heritage is that they said a prayer after a kill, thanking the soul of the animal for the survival it will help. That eased my apprehentions towards eating meat.
Once in a while we have a "Raclette" of the traditional beef, pork, turkey, chicken, wild duck, deer, caribou, moose (good stuff!), wild boar (sanglier), horse and emu. With a topping of shrimp. What a feast!
If you can't eat something with a face, cut the head off!