Shop measuring spoons, socks, a backpack and even cat-themed jewelry for the cat lover in mind. (Fox News Composite) We all know that one cat owner who’s convinced their pet is their child, and if you’re unsure what to buy them, we've done the heavy lifting and sourced some of the best cat-themed gifts they'll absolutely love. From  personalized cat socks to  LEGO cat sets and even a  cat backpack for owners who can’t bear to leave their furry friend for too long, these gifts are equal parts