How smart is your pet? The book Test Your Cat: The Cat IQ Test claims to be able to tell you ‘how smart your cat really is’. He or she might be an ‘undiscovered genius’. Using the book, you score your cat on a variety of questions, perform a calculation, and this gives you the cat’s IQ. The first question is whether the cat eats on a regular schedule. The second is whether it eats a variety of foods. There are many other questions. Now, I have no idea how seriously this book is intended to be taken. But it strikes me that there is something very odd about the idea that eating on a regular schedule and enjoying a varied diet have anything to do with intelligence, as we usually understand that term.