This is how a cat gets its prey: The cat arches its back , then steps, then runs,then puts it in his /her claws, then eats it.When there is a preditor around, the cat hides. That is a cat adaptation. When a cat wags its tail ,it's mad at you.If it purs it means it's happy. Sometimes a cat hisses at you ,it means, STOP!!!!!!!!!!!!!!!!!!!