If your cat is very healthy, you feed the cat a wide range of variety; cats do not have to add vitamins and minerals. If you add the words, only those vitamins and minerals excreted. However, sick cats, add these things is sometimes useful: for example, anemia, iron pills will help the cat recover. Such treatments should only be carried out under veterinary guidance. Vitamins and minerals for pregnant or breast-feeding the cat, is also useful.

Cats can survive without food much longer time than humans, because the cat will not lose 40% of body weight died, (but, all cats lost weight in water of 10% -14%, there is usually fatal). It is understood that in exceptional circumstances, the cat does not eat for weeks, without water, can survive. For example, one from Liverpool, England Qipu Si tomcats, inadvertently loaded machine parts in a box, from shipping to Mombasa, Kenya. Four weeks later, when the box is opened in Africa, Qi Pusi although a bit thin, but still alive. It is believed that it is applied to the machine outside eating some oil and condensate produced very little to eat licking the water and survived.