system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do different species that are raised together not want to eat each other?

If you raise a cat and a rat together they will like each other, or so it seems from all the youtube videos of cats and rats snuggling or bird and a mouse hanging out. Why does this happen? If the cat gets hungry will it "relapse"?
gpt
Because under normal circumstances, eating your family is not conducive to survival. Similar animals when raised together, regardless of species, will often consider each other to be family. Because both animals are being regularly fed, there is no survival drive to kill for a meal and because both animals are familiar with each other, there is no safety/territory threat.