Aggressive behavior of cats, which is shownscrapes and bites, is perfectly natural. This behavior is never spontaneous, never a cat bite or scratch just like that, for no reason.
In most cases, aggressive behavior - it's a game or a reaction to certain actions of man.
Biting and clawing cats learn from birth,it is part of their development. So they learn to defend themselves or to deal with prey in the wild. For kittens this is the main form of the game, at the same time as the object of attacks they can use them any comer thing, whether it be a special toy or hand the host. Thus, the first thing to do - not to accustom the cat to his hand, as an object of attack. This is very important, it is not necessary to ignore this, otherwise further aggressive towards human behavior for cats will become the norm. If your cat still shows aggression and simple strokes lead to scratches and bites, it is necessary to take measures to protect against these attacks. Regularly she cut the claws, so you will avoid deep scratches, in the event of an attack. If the cat pounced on your hand, do not withdraw it, she will think that you continue to play with it. Loudly and clearly publish some short sound like "ah", but do not yell at the cat and do not abuse it, it will not help. A good way to indicate the cat on the inadmissibility of her behavior - grab her by the scruff of the neck, as it makes the cat with her kittens. Hold it in this position for a few seconds and do something with say, for example, "no" or "no", then gently push down and release. Cat with the birth understand such actions, she will know that doing something wrong. Biting cats often say that people do not understand her body language. Stroking a cat, often accompanied by the fact that it begins to purr, squint your eyes and just takes a relaxed position. If the actions of a cat is not observed anything like this, perhaps it shows that it is not something like a continuation of strokes in this case may lead to the bite. Strong fear can also cause bites. If your cat is constantly afraid of something, often play with her and try to calm the pat, in extreme cases, contact your veterinarian for necessary medicines.