[koumba]

I can see ur a candidate for speciesim(sp).
Speciesm deals with the arguments u have raised,and many more.
There is infact a lot of debate among the intellectuals about this thing,some believe we are doing wrong by e.g eating other living things(ie plants and animals) just as we would be if we were to eat our own species..........
Yet on the other hand,the species that doesnt eat other species wont survuve.......
whether or not it is morally wrong to farm humans will take us deep into the concept of the definition of what is moral or not.
We humans are selfish and we already "farm" one another but this time,its not so obvious to the naked eye.One cannot survive in this world without using others....a company uses its employees in "cubicles" to manufacture money just as a farmer uses a hen tomanufactures eggs ...you give em enough to live on and ur good to go.....

Its a huge debate with many arguments and counterarguments that the best advise i can give you is to google the topic ,study darwinism,read books like "The Selfish Gene" by Dawkins,just to get the ideas and scope of isues at hand.