Saw a fellow English native (from the US) falsely correcting a learner's English today. The general rule for pluralising nouns is by adding the suffix -s, without an apostrophe. My guy corrected the correct version by adding an apostrophe 💀 I don't even know how to reply to that without sounding pretentious... Tl;dr: If there is more than one cat, ❌️ Cat's ✅️ Cats