What are the possible reasons that cats act badly

Like all animals, cats can have a bad side. Scratching, clawing, hissing, and "forget" to use the kitty litter - these behavioral problems and others can annoy a relationship of healthy cat-person. But why cats I do wrong? And what can be done to correct their aggressive behavior before it is out of control?
The first thing to remember is that cats are still wild animals at heart, despite all attempts of domestication. Although they live in a human world, they think or act like humans. You must remember that you have to act in their world, at the same time you want to do.
To find the source of the problem cat behavior, look around. Like all organisms, they respond to the world around them. Life has changed significantly? For example, will bring you another cat at home? Or perhaps there is a new member of the household living in your home. Any changes, minor or major, the usual routine of your cat can do his or her own works in response. You can not delete it needed stimulus, but understanding it can help reduce its effects on your cat.
Secondly, there may be an underlying medical problem will affect your cat's behavior. Make sure that the vet has given your cat a clean bill of health. When there is disease, cats can become aggressive or change their behavior and domestic peace.
To change the behavior of your cat, you need to reinforce positive behavior. Praise, love and food in exchange for good behavior you want, whatever you teach the cat the limits of acceptable behavior. Punishing your cat, however, is a losing proposition. The cat did not respond to negative reinforcement. The single firm "no" when he works in the area may help, but still only hurt your cat away.
Finally, remember to direct his aggression on other targets, such as cat toys. This will allow your cat an outlet for other natural behaviors while not interfering with your life and your property.