TEST rock BEST rock - the only TEST pet for me is going to be my Rock Raiders(TM) Pet Rock produced from the finest spoil from @Black Sunder own Orion.
Your Rock Raiders(TM) Pet Rock will come with a certificate of authentication and only the finest stick-on googley eyes. Play with it, speak to it, throw it, task it to keep papers from blowing off your desk or holding the door open, use it as a blunt instrument when needing to defend yourself - there is no end to its usefulness, and what could be better than no wasteful food or water requirements meaning it is your pal for life while not draining your life support.
Get yours, NOW! (once they have coded it in to the game, which may be never.)