I need advice on keeping puppy out of cat food and vice versa?



I have never raised a puppy with cats before and need some advice. My cats just turned 1 year old and the puppy is about 14 weeks old. I had cats but it was a long time ago. We adopted these cats after our dog ( best friend ) of 10 years passed away. The puppy is eating the cat food and the cats are eating the puppy food HELP! The puppy is a rotty mix.