Cats are known as animal that is able to hide its true health condition. However, there are some cat illness symptoms that are easily spotted to make sure that there is something wrong with the cat. A sick cat may find a dark, quiet place to hide, may be under the bad, in a closet, or in a corner. This is done to avoid painful movement or conserve energy. That is why it is wise to prevent a sick cat from going outside since it can be difficult to find it when it had found a hiding place. Other indications include changes in behavior, in physical appearance, or in the patterns of eating and drinking.