There is no reason to fill guilty about eating meat. There are simply too many people, so eating meat is unsustainable. Also unsustainable--building and living in huge houses, driving absurd fuel guzzling vehicles, eviscerating vast acreage of old growth forest, etc. We evolved to eat meat so we could survive and be successful and we have been successful: there are billions of us. Unfortunately that's not working. Perhaps veganism is the future but evolution takes time. We have to live through pandemics and global warming first.