Let me know if there is any major flaw in that ethic...
There is no major flaw, to live your life without hurting another life is a virtue but I hardly find it attainable and for some very impossible but it certainly is the right idea.
As for me though, I believe that nature was created by God or the Universe. That being said, in nature an eagle will fly down and steal a baby rabbit and feed it to its young and this is natural. I believe natural is good.
When we almost killed off all the buffalo to hurt the Indians and steal a little fur for profit, this is not natural I consider wrong. That is the gauge I follow.
I knew someone like yourself in the Navy and he was to winter over in Antarctica and I did not know how he would survive so I convinced him that it was ok to eat eggs as they are not fertilized and would only go bad if you didn't eat them.