Positive Behavior Training
A natural reaction to being grabbed or bitten, even play- fully, is to swat at the cat. Don't do this! Physical punishment may cause your cat either to fear you or to engage in even rougher play. If your cat becomes afraid of you, you may face a bigger problem--that of defensive aggression. If the attack can be anticipated, a blast of air from a compressed air can (obtained from a photography store), a squirt from a water gun, or the noise of an audible alarm or a shaker can (an empty soda can with pennies in it) may discourage the behavior if produced at the moment of the attack. Timing is everything. If "fired" a second or two after the incident, the deterrent will not be connected with the attack in the cat's mind and no training will take place, although the cat may be frightened and confused.
the best deterrent is the one that is always at hand--one's voice. A loud
and shrill "Eek", followed by a sharp "No!" can be very effective with
some cats. The next step is to shun the cat for the next ten minutes. This
training method works well--if you are patient and consistent.