Why did my cat suddenly become aggressive?

Why a cat suddenly becomes aggressive depends on the specific situation. If the cat turns aggressive while you are petting it, you may have the scent of another cat or some other odor on you. Cats are unhappy when they smell strange scents on their owner, so wash your hands before petting the cat.

A sudden aggressive turn can also be caused by being startled; in that case, gently comfort the cat and place it in a quiet environment. In addition, when a stranger or an unfamiliar pet comes to the home, the cat may also become aggressive.