You’ve probably seen them — those dreamy white-and-colour cats with just a splash of black on the head, or a tail like it was dipped in paint. They’re called van or harlequin, and their colouring comes from a gene called white spotting — or ws for short. But here’s the twist: Not every cat with this gene looks the same. Some have just cute little socks or a white belly…Others are almost completely white — and yet they don’t carry the gene for dominant white (w) at all. So wha

Every cat has two stories, although most people only notice one of them. The first story is simple because it is written on the surface: the colour of the coat, the shade of the eyes, the length of the body or the shape of the head, the kind of things you notice immediately when you look at a photograph. The second story is harder to read because it is hidden in the genetic code, and even when it does not show on the cat itself it can still be passed on to the kittens, often