Are shrimp potential slaves too? How about plankton? Insects? If a silicon wafer becomes sentient does it become a slave? How can you tell which is which? Co

Are shrimp potential slaves too? How about plankton? Insects? If a silicon wafer becomes sentient does it become a slave? How can you tell which is which? Considering we are talking about life in all cases including plants I have always wondered how people draw this imaginary arbitrary line. You can't really survive without consuming living organisms, so by what criteria does consuming one become sickening?