Rough Play & Play-biting:

The easiest way to prevent play-biting and rough play is not to play rough with your cat. Do not turn petting time into wrestling time. Do not turn your hands or wiggling fingers into your cat's favorite toy. Use toys that offer some distance between you and your cat. Pole toys, bouncing balls, and cat dancers are wonderful alternatives to your hands. If your cat becomes over-stimulated and begins to nibble at your hands and arms during petting time, give your cat a stuffed toy to chew on. This will teach him/her what is correct to nibble on and what is not.

Sometimes cats will get overexcited during petting time, and will begin to nip at your fingers and hands. This is not an aggressive act! They are displaying what people sometimes call "love bites". It is an affectionate display from your cat and should not be corrected, as it will confuse your cat. If your cat bites down too hard, stop petting your cat and walk away.

Some cats have a very high play-prey instinct. This basically means that they get extremely excited very quickly and will sometimes attack your feet, legs, etc. Be sure your cat has enough toys to sway his/her attention, and keep him/her busy. Correct your cat when he/she plays inappropriately, and offer proper toys. Always offer praise and rewards for good behavior in addition to corrections.