There are a few things to remember before attempting to correct your cat's behavior. First, there is the problem of perspective. Your cat isn't terribly worried about what it is doing, as it seems perfectly natural to it. The second is that physical abuse given because of bad behavior will not help the situation at all.

Scratching your living room couch, fighting with other pets or you and using the bathroom other than his litter box are all signs of aggressive cat behavior. Curbing these harmful and destructive behaviors it is necessary to change the change the behavior through non-violent or aggressive means.

There he goes again scratching your living room couch, take heart he isn't doing to make you mad or to demolish it. Scratching is a natural habit for him. Instead offer him a scratching post to curb that instinct. Praise him when he uses it and if he slips up and starts attacking the leg of your couch again place him near his post. He will get the idea in time.

Another aggressive cat behavior is fighting with other cats. If you have more than one cat, then you will soon learn that these creatures are often territorial. Cat's also have an inbred instinct to hunt and stalk and having another cat in the house (or your shoelaces) will make for good prey. To curb this behavior, one can separate things like litter boxes and food bowls so that each cat can have their own area.

Just like people, cats can have mood swings. Changes in mood can cause docile cats becoming aggressive cats. Illness can also cause temporary cat problems that manifest as aggression. Cats that are ill often feel vulnerable, and therefore find the need to defend itself. When you know your cat well, you can recognize the signs of imbalance early before the cat becomes aggressive.