It isn’t easy, but it can be done. If you are tired of bipedal life, of the whole absurd rigmarole of walking upright, wearing clothes, eating your food with utensils — plus all the objects it seems necessary to acquire, like food processors, cars, coffee tables, game consoles, and hair dryers; plus all the rituals that no one likes but everyone feels obligated to go on with anyway, like cocktail parties with your coworkers, visits with relatives who ask why you didn’t visit sooner, charity fund-raising drives, and posting things on social media — if you are tired of all that, then it is possible, with practice and determination, to become a cat.