There is always the appeal to nature argument. Slightly off topic. On one of my hikes with my dog. I wouldn't let him drink from a stream. Some people near by waved to me and said "It is fine! Dogs know good water". I thought how absurd. Another time we came across some small animals. He has a high prey drive. He made some aggressive advancements towards the creatures. I called him off. A person sharing our hike made the comment that it was okay. If he ate the small animal it would be good for him. It is natural. I said no the possibility of my dog contracting a parasite like tape worm would be a very bad thing. Nature can kill or hurt you in very natural ways.