User blog comment:Unownshipper/Flora and Fauna of Rapture/@comment-6024608-20131026081709/@comment-75.36.141.11-20140303103440

Pigs would be a logical 'farm' animal because they can eat garbage (produce leftovers) and food scraps (being omnivores)  and arent too picky. But with other farm byproducts (from grains like wheat) for silage, various other (herbivore) farm animals could be had and others like rabbits. All of them do not require 'open fields' to live and grow.