I eat a paleo/low carb diet and feel healthier for doing so. So I eat a good amount of grass fed meats. Do I feel bad for it? Yeah, in a way, I wish no animal needed to die before their time in order to feed me. I feel better that the animals lived a more normal life eating grass in a meadow, instead of the corn fed at animal factories.

And at the same time realize that grains, fruits, and vegetables grown kill animals too. Right now we are lucky to live in a time where oil, fossil animals, are used as fertilizer for plants. Once the oil runs out people will return to using fish and bone meal as plant nutrients. Then there is harvesting that kills millions of animals each year. Pollutants run into our oceans that kill wild life also. As an example there is a dead zone the size of NJ in the Gulf of Mexico where the Mississippi empties. Our agriculture has displaced animals in mass from the lands. And finally, thinking off the top of my head, the top soil and water supply are running short from the crops grown.