See my response here[0] on whether living in nature or on a factory farm is more more horrific. The gist is: each breeding pair of animals produces, on average, just two offspring who themselves live to reproduce. The implication is that the vast majority of animals ever born die of predation, starvation, or via exposure to the elements. Nature is a bloodbath.

[0]: https://news.ycombinator.com/item?id=18773106