Fat cat

I was looking down into the garden this afternoon when one of our three cats decided to relax. His name's Rocco, otherwise known as Tubs, Porco, Samsonite and the GFGO (the Great Fat Grey One). You can admire him here. And before you report me to any animal welfare organisations, maybe you can tell me how to put one cat on a diet and not the other two, both svelte and rangy by comparison, without separating them. Dogs are easy; they eat to order. Cats, as we know, are picky and approach eating much as Greeks seem to do, in a leisurely intermittent fashion, as though they had all the time in the world. As, indeed, they do. (Cats, that is.)