Well, if you want to paint my thoughts red, the question is one of consumption versus enslavement. If this science is determined ethically right, then perhaps it will be OK next to create zombies? Many animals consume other animals for sustenance: Few play with their prey like this. It seems we mock the notion of gods but have no problem substituting ourselves for what we revile. Perhaps there is no self-determination in a rat, or a beetle, but I question the morality of taking away any chance it has for autonomy while leaving it alive to do the bidding of an outside entity.
Trying to update my sig ...