I was talking to Mrs W about the strange phenomenon of cat foods specifying the particular type of feline that might eat them. The pack of Science Plan below is designed specifically with sterilised moggies in mind.
The next step is clearly to extend the idea to humans. Forget traffic lights with salt, sugar and fat. It's food for the single mum. Or an adventurous young professional. Or a father-of-four, post-vasectomy.