Because animals do not have this capacity they do not have such responsibility. It is different with man. If you carry a pigeon from here to a distant country, and there set it free, it will return, for it remembers the way. And yet, observe what a reliable set of scales they have, by means of which to differentiate the good from the injurious. In some of the more industrialised societies, farming is big business, intent on supplying the market with maximum efficiency and profit.
Animals are part of the production line and factory farms are the norm.
Chickens and turkeys, which never see the light of day, are unnaturally fattened for the market. Eggs are produced in houses where hens are packed into tiny cages with mesh floors, with all natural movement constrained. Animals are tightly packed into transporters, sometimes three stories high, travelling many hours, without food and water. For example, the lion is endowed with carnivorous teeth which are intended for meat and if meat be not found, the lion starves. The digestive system of the lion is such that it cannot receive nourishment save through meat.