In the wild, cats love to prey on mice. If a cat is hungry, it will eat the entire animal, skin and hair included. Mice are a natural mix of wet and dry food comprising bones, cartilage, flesh and blood. Ready-made cat food also offers this combination but is less gruesome and also suitable for house cats.Tinned food and dry food are both suitable as a main meal. Your cat's preferences will depend on what they ate as kittens. Ready-made food contains a balanced mix of all the nutrients a cat needs so there is no need to worry about vitamin or mineral supplements. The nutrient composition in wet food is similar to that found in natural prey. Dry food has a similar nutrient content but contains very little moisture, which means that your cat must drink enough water.Left-overs should not be part of your cat's diet. Much of the food that humans eat is unhealthy for cats and will make them ill. Spices and too much fat or sugar are dangerous for their health. Raw meat waste should not find its way into your cat's food bowl either as raw pork, for example, may contain pathogens that can be fatal to cats. Left-overs such as potatoes or rice contain too much starch for a cat's sensitive stomach, and the sugar content in sweet food means that it is bad for their teeth and digestion.