Animals and Humans

So last week we had an exciting discussion about animals, PETA, hunting, and etc.

Some ideas that came up was, is it "wrong" to hunt out of pure enjoyment? Is it "wrong" to hunt for sustenance?
Eventually, out of these question came the idea that there's a difference between eating domesticated farmed animals versus wild natural animals.
For the sake of argument, let's say that, morally, there IS a difference between eating domestic and wild animals. In terms of the animal, i think that the only difference would be in the upbringing of the animals since whether a chicken lives between a fence or in a field, it is still a chicken. The only factor that distinguishes the two is that one was meant to live its natural life and one was meant to be sold and consumed.

So then let's say that there were humans bred solely to kill and fight. like a super soldier. All they knew was to kill and they are programmed to not be morally afflicted by it. Would the weight of their death be diminished since their purpose is to kill and be killed?

Now taking the flip side of this idea where the same object can be different based on their circumstances, can 2 different objects become the same if taken through the same consequences?

Tying in to "Androids," what about androids vs. real humans? Would you consider those androids such as Rachel Rosen who thought that she was a human and was raised as a human to be more human? She clearly thought of herself as a human and lived like a human but did that make her human?