Aye but they'd still need a lot more space and more energy input to sustain than a hydroponic facility full of plants and vegetables. Unless you genetically engineer them to be big cubes of meat with no legs and store them on racks, but then you'd have a whole new ethical dilemma and that's a big kettle of fish.Thats where genetics comes in, making space cows.

But that'd be the very least of your problems if you're going to head for a habitable star system... should such a thing exist within 'reach'.
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I actually wanted to put this in speaker's corner but I didn't know if it had to be in the news? 
