Most food animals would go extinct if humans stopped raising them for food. A number of food plants too.
A “food animal” … Most of the animal breeds slaughtered for meat were basically genetically modified through selective breeding by humans to be more profitable.
Fast and unhealthy growth of muscle mass, additional rips, laying eggs much more often, etc.
These modification come with a great price the animals have to pay in pain. Most of them can’t live without human help anymore. We made them this way and we are responsible. To keep them in an endless cycle of suffering after we created them like this is probably the pinnacle of cruelness. And all of that just because they have a voice we do not understand or recognise.